Give examples to distinguish (i) Distance and displacement. (ii) Speed and velocity. (iii) Accelerat

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7. MOTION

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Give examples to distinguish

$(i)$ Distance and displacement.

$(ii)$ Speed and velocity.

$(iii)$ Acceleration and retardation.

Option A

Option B

Option C

Option D

Solution

$(i)$ If one states that' the car has travelled $100 m ^{\prime}$, it means that it is the distance travelled by the car. But if one states that 'car has travelled $100\, m$ due north' it means that the displacement of the car is $100\, m$ towards north.

$(ii)$ If a body starts its motion from a point and comes back to its initial position after a a al positon a a certain time, the displacement is zero, the average velocity is also zero. but the total distance travelled is not zero and, therefore the average speed is not zero.

$(iii)$ The motion of a car in a busy market is with variable velocity. In such a case, if the velocity of the body increases with time, the motion is said to be accelerated while if the velocity of the body decreases with time, the motion is said to be retarded

Standard 9

Science

Write true or false for the following statements

A body is said to be at rest, if it does not change its position with respect to the reference point.

easy

The slope of the line on a position-time graph reveals information about an object's velocity. What conclusion can you draw regarding the motion of an object, if the graph is a

$(i)$ Horizontal line.

$(ii)$ Straight diagonal line.

$(iii)$ Curved line.

medium

The brakes applied to a car produce an acceleration of $6\, m s ^{-2}$ in the opposite direction of motion. If the car takes $2\, s$ to stop after the application of the brakes, calculate the distance it travels during this time.

medium

There are 5 houses on a street, $A, B, C, D$ and $E$. For all cases, assume that positions to the right are positive.

$(i)$ Draw a frame of reference with house $A$ as the origin and the positions of houses $B, C, D$ and $E$.

$(ii)$ You live in house $C.$ What is your position relative to house $E$ ?

$(iii)$ What are the positions of houses $A$ and $D$, if house $B$ is taken as the reference point ?

medium

An object is moving with uniform speed in a circle of radius $7\, m .$ Calculate the distance and displacement when it completes half the circle. What type does the object possess ?

easy

Give examples to distinguish $(i)$ Distance and displacement. $(ii)$ Speed and velocity. $(iii)$ Acceleration and retardation.

Solution

Similar Questions

Write true or false for the following statements A body is said to be at rest, if it does not change its position with respect to the reference point.

The slope of the line on a position-time graph reveals information about an object's velocity. What conclusion can you draw regarding the motion of an object, if the graph is a $(i)$ Horizontal line. $(ii)$ Straight diagonal line. $(iii)$ Curved line.

The brakes applied to a car produce an acceleration of $6\, m s ^{-2}$ in the opposite direction of motion. If the car takes $2\, s$ to stop after the application of the brakes, calculate the distance it travels during this time.

An object is moving with uniform speed in a circle of radius $7\, m .$ Calculate the distance and displacement when it completes half the circle. What type does the object possess ?

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Give examples to distinguish

$(i)$ Distance and displacement.

$(ii)$ Speed and velocity.

$(iii)$ Acceleration and retardation.

Write true or false for the following statements

A body is said to be at rest, if it does not change its position with respect to the reference point.

The slope of the line on a position-time graph reveals information about an object's velocity. What conclusion can you draw regarding the motion of an object, if the graph is a

$(i)$ Horizontal line.

$(ii)$ Straight diagonal line.

$(iii)$ Curved line.