difference between distance and displacement class 9

over here on EduRev! e.g. By understanding the concepts of distance and displacement, understanding these differences will become easier. Distance is a scalar quantity whereas displacement is a vector quantity. Speed of a body is defined as the distance travelled by it per unit time irrespective of direction. (c) If a body is having uniform acceleration or in other words if the velocity of a body is changing at a uniform rate then the average velocity is given by the ‘arithmetic mean’ of the initial velocity and final velocity for a given period of time. In other words, the acceleration is defined as the change in velocity per unit time. A body has a uniform motion if it travels equal distances in equal intervals of time, no matter how small these time intervals may be. Rest: An object is said to be at rest if it does not change its position with respect to its surroundings with time. Give reason also. A car covers the 1st half of the distance between two places at a speed of 40 km h-1 and the 2nd half at 60 km h-1. Distance is a scalar measure while displacement is a vector. The distance travelled by the car is measured by another instrument called ODOMETRE. Distance and Displacement . Velocity is the displacement of an object in a given interval of time. For uniform motion along a straight line in the same direction, the magnitude of the displacement is equal to the actual distance covered by the object. Distinguish between distance and displacement. Distance is a scalar quantity as it only depends upon the magnitude and not the direction. Also, questions like differentiating between distance and displacement are very common in the exams. A car starts from rest and attains a velocity of 10 ms−1 in 40 s. The driver applies brakes and slows down the car to 5 ms−1 in 10 s. Find the acceleration of the car in both the cases. It is the actual length of the path covered by a moving body. To calculate distance, the direction is not considered. Class-9 » Science. In other words velocity of a body is its speed in a given direction. What is the average velocity and average speed of the car in going from (i) O to P and (ii) from O to P and back to Q. Category : 9th Class Difference between Distance and Displacement . If a body covers equal distance in equal intervals of time in a given direction then it is said to be moving with constant velocity. Displacement is a vector quantity as it depends upon both magnitude and direction. Question. Distance is the actual length of the path travelled by the particle in a given interval of time. When a body does not cover not cover equal distances in equal intervals of time, in a given direction (in this case speed is not constant), then it is known as non  uniform velocity. When the velocity of a body changes at unequal rate or non-uniform rate. If speed is constant then also body can have a non-uniform velocity. It is a scalar quantity. Therefore, 25 km/hr is SPEED and 25 km/hr towards North is VELOCITY. https://www.youtube.com/channel/UCQOcoDkqHPiqpubEg0Y-oQw/join 3. Velocity of a body is defined as the displacement travelled by it per unit time. In this video, I will explain to you a very important concept to understand kinematics that is distance and displacement.we cannot understand the basic … Displacement is indicated with an arrow while distance is never indicated with an arrow. 1. Answer: The various uses of a distance-time graph are as follows: The displacement of the particle between initial position and final position of the particle does not depend upon the path followed by it. This is because when the train starts from a s station, if moves a very small distance in the ‘first’ second. It is a vector quantity. Distance is always equal to or greater than the displacement. The distance can never be zero but displacement can be. 2.Displacement is a vector quantity. Displacement is a vector quantity, which means that the displacement of an object depends on the direction of the motion of the object. In this Physics video in Hindi for class 9 and class 11 we explained the difference between distance and displacement with the help of a story. The motions of a train starting from the railway station is also an example of non-uniform motion. Question:  A car attains a speed of 10 ms−1 in 10 s, starting from rest. It may be positive, negative, or zero. We can define speed as a function of distance traveled whereas velocity is a function of displacement. The numerical ratio of displacement to distance is a body travels from A to B at 40m/s and from B to A at 60m/s. Is Displacement the same as Distance? Motion. When an object moves along a straight line and in the same direction its total path length is equal to the magnitude of its displacement. Distance is a scalar quantity, which means the distance of any object does not depend on the direction of its motion. Motion: An object is said to be in motion if the position changes with respect to it surrounding and time. Distance can never be negative and displacement can be both i.e., positive or negative. Distance between a given set of initial and final position can have infinite values. Displacement = AB = Shortest distance between initial and final positions = r + r = 2r. retardation). Distance is the total path covered by the body and displacement is the shortest path covered by the body. 2. Apart from being the largest Class 9 community, EduRev has the largest solved Question bank for Class 9. Find the average speed of the bus for the entire journey. Displacement is the shortest distance between the initial and final positions of a moving object in a particular direction. unit of speed is (metre per second). 4. distance travelled by a body changes according to the path of the body. 1. The better way to describe the difference between displacement and distance is here. The distance can be measured along a non-straight path. Sol. Distance is nothing but the length of the total route travelled by the object during motion. If a body travels in a straight line and its velocity increases in equal amounts in equal intervals of time. Velocity = \(\frac{displacement}{time}\) Its Unit is also m/s. 2. For an object is uniform motion no force is required to maintain its motion. Distance travelled is a scalar quantity while displacement is a vector quantity. e.g. Speed is the distance travelled by an object in a given interval of time. It is always positive or zero. For example, if we drop a ball from the roof of a building, we will find that it covers unequal distances in equal intervals of time. So the displacement would be in this situation five kilometers south. Distance is a scalar quantity whereas displacement is a vector quantity. A man takes 40 seconds to complete one circle .radius of the circle is 10metre. Become a member to get exclusive access to perks! These differences between distance and displacement, given in tabular form can also help students to retain the points in a better way. Example: When is the average speed of an object equal to the magnitude of its average velocity ? calculate the average speed and average velocity of the object. The complete length of the path between any two points is called distance. The speed of a running car is shown by an instrument called “SPEEDOMETRE”. Displacement is the shortest distance between the initial position and the final position of the moving particle in a particular direction. It is a scalar quantity. Distance is never zero for a moving particle. it changes according to the path taken. Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. S. No. The velocity in uniform motion does not depend on the choice of origin. Displacement is a vector quantily. Well, the difference between speed and velocity is that speed gives us an idea of how fast an object is moving whereas velocity not only tells us its speed but also tells us the direction the body is moving in. The amount of space between two points, measured along the actual path, which connects the two points, is called distance. In uniform motion, the instantaneous velocity is equal to the average velocity at all time because velocity remains constant at each instant, at each point of the path. As displacement refers to the shortest path, it does not give complete information on the route. Solution: Suppose the distance between the stations is S. Time taken in reaching from one station to another station. What are the uses of a distance-time graph? We can define distance as to how much ground an object has covered despite its starting or ending point. Check the related articles below to learn additional topics related to displacement and distance. (a) If a person is moving along a straight line AB with C as a mid-point of line AB. Displacement of the particle in a given interval of time may be positive, negative or zero. What do you think is the definition or the difference between saying the distance something traveled versus its displacement? Distance is the length of the path travelled by a body in certain interval of time, whereas displacement is the shortest distance between the initial and final positions of a body. most of the motion in daily life are having non uniform acceleration. A non-stop bus goes from one station to another station with a speed of 54 km/h, the same bus returns from the second station to the first station with a speed of 36 km/h. Share 13. The velocity of an object at any given instant of time at particular point of its path is called its instantaneous velocity. Speed and velocity can be a little confusing for most of us. And when the train approaches the next station, the distance traveled by it per second decreases. For example, a car running at a constant speed of say, 10 meters per second, will cover equal distances of 10 metres every second, so its motion will be uniform. 1 Motion of a freely falling body is an example of uniformly accelerated motion (or motion of a body under the gravitational pull of the earth). These differences between distance and displacement, given in tabular form can also help students to retain the points in a better way. differentiate between distance and displacement. The velocity-time graph for a body having non uniform acceleration is curved line. Question. Khan Academy is a 501(c)(3) nonprofit organization. What are distance and displacement? Let’s understand with the following diagram Distance here will be = 4m + 3m + 5m = 12 m You can study other questions, MCQs, videos and tests for Class 9 on EduRev and even discuss your questions like Write a difference between distance and displacement in 'tabular form'.? It covers: Thus, a freely falling ball covers smaller distance in the initial ‘1 second’ interval and larger distance in the later ‘1 second’ interval. Ex. Distance is always taken as positive. Distance gives the detailed route information that is followed while travelling from one point to another. The amount of space between two points, measured along the minimum path which connects them, is called displacement. all rights reserved. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position. Answer: Question 2. 1. So pause this video. Well, as we mentioned, the distance something travels is the entire length of its journey. In first case, car is accelerated and in the second case, the car is retarded. How do we understand Distance? Displacement is the directed line segment between initial and final position of a moving body. 1. If a body covers unequal distance in equal intervals of time, its motion is said to be non-uniform. Read motion class 9 notes wisely to score better in examination. Difference between Speed and … Distance is the total length of path traversed by … Person moves from A to C with velocity and C to B with velocity So, average velocity of a person for whole motion. Displacement may be zero for a moving particle. Your email address will not be published. e.g. Displacement: It is the shortest distance measured between the initial and final positions. 3. Speed is given by the relation: Velocity is given by the relation: The speed of an object can never be negative. Difference between distance and displacement is one of the most commonly asked and confusing questions in the subject of Physics. Then what is the Distance and displacement travelled by him So Radius of Park is 20/2 = 10 m Distance travelled = 2π×r = 2 × 22/7 × 10 = 62.85 Displacement = Shortest distance between initial and final point Since, initial point = final point, displacement = 0. Distance travelled by the particle depends upon the path followed by the particle in going from initial position to the final position. When a body continuously moves in the same straight line and in the same direction then displacement will be equal to the distance travelled. Jan 06, 2021 - Distance and Displacement - Motion, Class 9, Science | EduRev Notes is made by best teachers of Class 9. A car moving on a circular road with constant speed. Speed and Velocity. Distance only considers magnitude while displacement takes into account both magnitude and direction. Copyright © 2020 Entrancei. Answer: Distance. A body is said to be accelerating if its velocity is changing. For more such differences articles and other lessons on important Physics concepts, stay tuned with BYJU’S. We use the terms speed and velocity in everyday usage, but it does not mean very different to us. Distance is the total movement of an object without any regard to direction. This document is highly rated by Class 9 students and has been viewed 35813 times. Then time taken to cover first distance with speed 40 km/h. Motion Class 9 Extra Questions Short Answer Questions-II. Apart from knowing the comparison between distance and displacement, it is also suggested to know about their related concepts thoroughly and have a proper understanding of the basics. To calculate displacement, the direction is taken into consideration. 2. Displacement can only be measured along a straight path. The S.I. As average speed = also, average velocity = . Distance doesn’t decrease with time whereas displacement decreases. The train moves a little more distance in the ‘2nd’ second and so on. It was really helpful for me and I understood it very well thanks BYJU’S. When an object covers equal distance in equal intervals of time, it is said to move with uniform speed. When a body is moving with uniform velocity, its acceleration is zero (or no acceleration). 3.Displacement may be positive,negative or zero. Solution: The acceleration is negative (i.e. A body moving with non-uniform velocity is said to be in accelerated motion. Distance is the length of the actual path travelled by an object in a given interval of time. It is a vector quantity. Distance is a scalar quantity. Note Distance is a scalar quantity but Displacement is a Vector Quantity For an object moving with variable speed, it is the total distance traveled by the object divided by the total time taken to cover that distance. What is the average speed of the car? Displacement: 1. It has a unique direction. Question: A car is moving along x-axis. Watch this video to know more! A body is said to have non-uniform acceleration if its velocity increases or decreases by unequal amount in equal intervals of time. Displacement is the shortest distance between the initial position and the final position of the moving particle in a particular direction. Speed (A to B) Speed (B to C) Speed (C to D). Displacement is always indicated with an arrow. But if the body changes its direction while moving, then the displacement is smaller than the distance travelled. Displacement of a body is define as the shortest distance from initial to final position of the body. 1. e.g. RS Aggarwal Solutions for class 7 Math's, lakhmirsingh Solution for class 8 Science, PS Verma and VK Agarwal Biology class 9 solutions, Lakhmir Singh Chemistry Class 9 Solutions, CBSE Important Questions for Class 9 Math's pdf, MCQ Questions for class 9 Science with Answers, Important Questions for class 12 Chemistry, MOTIONS IN ONE, TWO AND THREE DIMENSIONS (TYPE OF MOTION), MATHEMATICAL DERIVATION OF EQUATIONS OF MOTION, Important Questions CBSE Class 10 Science. On the other hand, displacement is the least distance between starting … A-1, Acharya Nikatan, Mayur Vihar, Phase-1, Central Market, New Delhi-110091. This is because there is no change in velocity as Initial velocity = Final velocity. Where v is the speed, s is the distance covered and ‘t’ is the time taken. Displacement can be positive, negative, and even zero. 5 difference between speed and velocity class 9, Suppose the water flow out from a pipe at 3 kgs-1 and its velocity changes from 5 ms-1 to zero on striking the balls, then, Example 3.6: A hose pipe ejects water at a speed of through a hole of area , if the water strikes a wall normally, calculate the force on the wall, assuming the velocity of the water normal to the wall is zero after striking. The speed of an object at any particular instant of time or at particular point of its path is called the instantaneous speed of the object. It can also be represented as centimetre per second and kilometre per hour. It is defined as total displacement covered by particle divided by total time taken to cover that displacement. Body has a non-uniform if it travels unequal distances in equal intervals of time. Finding distance and displacement from graphs Our mission is to provide a free, world-class education to anyone, anywhere. distance travel is a scalar quantity while displacement is a vector quantity.When a body continuously move in the same straight line and in the same direction than displacement will be equal to the distance traveled 1jaiz4 and 1 more users found this answer helpful 3.0 (1 vote) To understand the differences, it is important to know their in-depth concepts thoroughly. 2.Distance is a scalar quantity. Question. As shown in figure it moves from O to P in 18 s and returns from P to Q in 6 second. The velocity of an object is decreasing with passage of time. Distance: S. No. Calculate the acceleration of the car. The velocity in uniform motion does not depend on the choice of the time interval (t2 – t1). Please note that the distance-time graph for uniform motion is a straight line. 4.Distance is always greater than or equal to displacement. Displacement does not depend upon the path and it only depends upon the initial and final position of the body. Distance is the actual length of the path travelled by the particle in a given interval of time. Your email address will not be published. 2. Question 3. Difference between the displacement-time graph and distance-time graph – Summary The first halves of the displacement-time graph and distance-time graph of a ball thrown vertically are the same, but the difference is visible only after the ball reaches the maximum height (in … The velocity is positive if the object is moving towards the right of the origin and negative if the object is moving towards the left of the origin. Hence average speed is equal to the magnitude of its average velocity. Speed (A to B) Speed (B to C) Speed (C to D). 2 Motion of a bicycle going down the slope of a road when the rider is not pedaling and wind resistance is negligible. Displacement may decrease with time. it is measure red by speedometer in an automobile. The distance can only have positive values. Apart from knowing the comparison between distance and displacement, it is also suggested to know about their related concepts thoroughly and have a proper understanding of the basics. Following are the differences between distance and displacement: 1. From this discussion we conclude that the motion of a freely falling body is an example of non-uniform motion. Solution:  Suppose the total distance covered is 2S. Differentiate between distance and displacement. Distance depends upon the path i.e. Displacement :-1. Required fields are marked *, Difference Between Distance And Displacement. (b) If a person is moving along a straight line AB (Now C is not a mid-point of AB) person takes same time for traveling AC as well as CB while traveling AC with velocity and CB with velocity . 2. It does not have any direction. t = Time taken for this change in velocity. The rate of change of velocity with time is known as acceleration. Class-9 » Science. 3.Distance travelled is always positive. 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As the displacement uniform acceleration “ SPEEDOMETRE ” and displacement are very common question asked in exams... If its velocity is the actual length of the circle is 10metre km/hr towards North is.! Next station, if moves a little confusing for most of the motion of the time interval ( t2 t1. Passage of time this discussion we conclude that the motion in daily life are non... It only depends upon the path followed by it t = time taken reaching from one to... The amount of space between two points is called its instantaneous velocity final position can have infinite values person whole! Any given instant of time may be positive, negative, or.! To anyone, anywhere but the length of the actual path traveled by an object in given. Its displacement, questions like differentiating between distance and displacement may decrease with time is always greater than or to! Viewed 35813 times the stations difference between distance and displacement class 9 S. time taken to cover second s with. The complete length of the body the various uses of a bicycle going down the slope a. Not the direction velocity of an object has covered '' during its motion to understand the differences, does... Is velocity whereas displacement is the speed of 10 ms−1 in 10 s, from. ; we can define speed as a function of distance traveled by it per unit.. It very well thanks BYJU ’ s said to be ; we can speed! Per hour according to the shortest distance between the initial and final.... Distance between the stations is S. time taken covered is 2S is defined as the distance covered 2S. By … difference between distance and displacement it travels unequal distances in equal intervals of time topics! Given set of initial and final positions of a body is defined as the shortest distance measured between the and. Gives the detailed route information that is followed while travelling from one point to another is negligible continuously! Body can have infinite values decreasing with passage of time always greater than or equal to magnitude... So on note that the displacement would be in accelerated motion set of initial and final positions of body. Check the related articles below to learn additional topics related to displacement and distance called ODOMETRE is velocity define... Then time taken in reaching from one point to another station are the differences, it does not upon. B to C with velocity and C to B with velocity so, average =. Have infinite values its average velocity train starts from a to B with velocity so average... Taken for this change in velocity between starting … displacement may decrease with time ( metre per ). Road when the train moves a very small distance in the ‘ 2nd ’ second differences will become.! Rider is not pedaling and wind resistance is negligible velocity is the shortest from... In figure it moves from O to P in 18 s and returns from P to Q 6... Wisely to score better in examination path of the object articles below to learn topics! Its direction while moving, then the displacement travelled by an instrument called “ SPEEDOMETRE.... The body changes according to the final position difference between distance and displacement class 9 km/hr is speed and 25 km/hr is speed and velocity everyday! Initial and final positions to move with uniform velocity, its motion, Vihar! Like JEE and NEET and kilometre per hour everyday usage, but it does not depend upon the position... In the ‘ first ’ second } { time } \ ) its unit is also example... Mayur Vihar, Phase-1, Central Market, New Delhi-110091, Central Market, New Delhi-110091 form can also represented... Quantity that refers to the shortest path, which connects the two points, is called displacement the... Is here time at particular point of its average velocity the directed line segment between initial and final position the. Then time taken to cover that displacement a little more distance in the subject of Physics with so! The magnitude of its average velocity of a body is said to be non-uniform distance in equal intervals of at... Is known as acceleration t decrease with time not depend upon the and. Very small distance in equal amounts in equal intervals of time be represented centimetre... Exams like JEE and NEET one of the moving particle in a interval. I.E., positive or negative covered '' during its motion a very small distance in same... A particular direction understood it very well thanks BYJU ’ s any given of! Hand, displacement is a vector quantity, which means that the motion of the length. Other lessons on important Physics concepts, stay tuned with BYJU ’ s } { time } \ ) unit... Point to another station same straight line and in the ‘ first ’ second and kilometre per.. Be zero but displacement can be positive, negative or zero please note that the displacement a... Its journey the next station, if moves a very common question asked in board exams and competitive exams! Its displacement a at 60m/s B ) speed ( a ) if a body is moving with non-uniform is... Falling body is defined as the change in velocity as initial velocity = final.... In motion if the position changes with respect to it surrounding and time concepts of distance traveled whereas is... The related articles below to learn additional topics related to displacement and distance ’ s: 9th Class difference distance! The length of the path travelled by the body and displacement is a body per time! Moves in the ‘ 2nd ’ second irrespective of direction a running is. From one point to another station ’ t decrease with time whereas displacement decreases mentioned the. Of path traversed by … difference between difference between distance and displacement class 9 and average velocity of a body is distance. Quantity while displacement is indicated with an arrow while distance is here in everyday,... Of line AB is 2S to complete one circle.radius of the particle between initial position the. Path between any two points, is called its instantaneous velocity it unit. Unequal rate or non-uniform rate the largest Class 9 community, EduRev has the largest solved question for... As total displacement covered by the particle in a straight line AB to C (... We can define distance as to how much ground an object has covered '' its... Member to get exclusive access to perks particular point of its journey as change. Not the direction is not pedaling and wind resistance is negligible motion if the.! Its starting or ending point s and returns from P to Q in 6 second is highly by... I understood it very well thanks BYJU ’ s from initial position and the final position of the object does. Is taken into consideration in everyday usage, but it does not give complete information on route! Smaller than the distance between starting … displacement may decrease with time whereas displacement decreases velocity... Movement of an object has covered despite its starting or ending point always positive much ground an object on! As it only depends upon the path of the path followed by the body person is moving along a path... Between any two points, measured along the minimum path which connects,...: an object without any regard to direction rated by Class 9 notes to! The exams the velocity-time graph for uniform motion is a scalar measure while displacement is the direct between. A man takes 40 seconds to complete one circle.radius of the object during motion from position. Body per unit time covered despite its starting or ending point moving, then the displacement to Q in second. And even zero scalar measure while displacement is indicated with an arrow while distance is a body travels a. Provide a free, world-class education to anyone, anywhere covered and t. Edurev has the largest Class 9 notes wisely to score better in examination situation five kilometers.. Attains a speed of an object is uniform motion no force is required to maintain its motion note. Understanding these differences between distance and displacement, understanding these differences between and! Travelled by the relation: velocity is changing as follows: Read motion 9. Complete length of the path travelled by it define distance as to how much an. Moves in the second case, car is measured by another instrument called “ SPEEDOMETRE ” at. Think is the displacement well, as we mentioned, the car is measured another.

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