Q.

In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?


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a

If the car is moving on a straight road

b

If the car is moving in circular path

c

The pendulum is moving to and fro

d

The earth is revolving around the sun  

answer is A.

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Detailed Solution

If the car is moving on a straight road, then the distance moved and the magnitude of displacement are equal
The distance moved and value of displacement are equal only in the case of motion along a straight line. Due to the fact displacement is the shortest path among initial and find paths. So, for the vehicle moving on a straight road, distance moved and magnitude of displacement are equal.
 
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In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?