Question

Statement I The average velocity of a moving particle may be zero for some time interval, although the average velocity for a shorter time interval included in the first interval is not zero.

Statement II Displacement of a moving particle can decrease as time passes.

• A. Statement I is True, Statement II is True; Statement II is a correct explanation for Statement I
• B. Statement I is True, Statement II is True; Statement II is not a correct explanation for Statement I
• C. Statement I is True, Statement II is False
• D. Statement I is False, Statement II is True

Answer 1

The correct option is B

Statement I is True, Statement II is True; Statement II is not a correct explanation for Statement I

The explanation for Assertion statement:

• The average velocity of a moving particle may be zero for some time interval, although the average velocity for a shorter time interval included in the first interval is not zero is true.

The explanation for Reason statement:

• The displacement of a particle can decrease if the velocity of the particle decreases with time.
• This reason is not a correct reason for the given assertion because if the average velocity for the very small first interval will be zero then it will mean that the particle is not covering any distance. Hence, no velocity is applied to the particle so the average velocity will be zero for all the next intervals in this case.

Statement I is true and Statement II is true but Statement II is not a correct explanation for Statement I. Hence, Option B is correct