Given below are two statements:
 Assertion (A): If the average velocity of a particle is zero in a time interval, it is possible that the instantaneous velocity is never zero in the interval. Reason (R): If the average velocity of a particle moving on a straight line is zero in a time interval then at least for one moment the instantaneous velocity will also be zero in the interval.

 1 Both (A) and (R) are True and (R) is the correct explanation of (A). 2 Both (A) and (R) are True but (R) is not the correct explanation of (A). 3 (A) is True but (R) is False. 4 Both (A) and (R) are False.
Subtopic: Â Average Speed & Average Velocity |
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Given below are two statements:
 Assertion (A): The average velocity of the object over an interval of time is either smaller than or equal to the average speed of the object over the same interval. Reason (R): Displacement is the shortest distance.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic: Â Average Speed & Average Velocity |
Â 59%
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Pick the correct statements:

 a. Average speed of a particle in a given time is never less than the magnitude of the average velocity. b. It is possible to have a situation in which $$|\frac{d \vec{v}}{d t}| \neq 0$$ but $$\frac{d}{d t}|\vec{v}|=0.$$ c. The average velocity of a particle is zero in a time interval. It is possible that the instantaneous velocity is never zero in the interval. d. The average velocity of a particle moving in a straight line is zero in a time interval. It is possible that the instantaneous velocity is never zero in the interval. (Infinite accelerations are not allowed)

Choose the correct option:

 1 (a), (b) and (c) 2 (b), (c) and (d) 3 (a) and (b) 4 (b) and (c)
Subtopic: Â Average Speed & Average Velocity |
Â 62%
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