Question

2.
1) The magnitude of the velocity of a particle is equal to its speed.
[?]
2) The magnitude of average velocity of a particle in an interval is equal to its average speed in that interva
3) It is possible to have a situation in which the speed of a particle is never zero but the average speed i
an interval is zero.
4) It is possible to have a situation in which the speed of a particle is zero but the average speed is na
zero.
a) 1 and 4 are true b) Only 1 is true c) 2 and 3 are true d) 1 and 3 are true



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Answer 1

Answer:

b) is the correct answer

Answer 2

Explanation:

1. False. Reason is if the path is not unidirectional linear, distance is not equal to displacement. So magnitude of velocity can't be equal to that of speed.

2. False, and the reason is same as above.

3. False, if speed of a particle is not zero, then it is moving some distance, so average speed can't be zero.

4. True. Suppose, a particle moved some distance and halted for a while, then instantaneous speed is zero but average speed can't be zero.