Assertion: Average velocity = (Initial velocity+Final velocity)/2 Reason: This happens when velocity of the body is changing at a constant rate.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
if assertion is false and reason is true.
Answers
Answer:
Correct option is D)
Average velocity is given by the ratio of change in displacement to change in time.
When a particle is thrown upwards, it is under a uniform acceleration equal to the acceleration of gravity. After some time, it returns to its point of projection. In this time interval, net displacement is zero and hence average velocity is zero. Hence, assertion is incorrect.
For a moving body, velocity is non-zero. If velocity is constant, displacement will keep increasing and hence, average velocity cannot be zero for a body under uniform motion. For average velocity to be zero, the body should either be at rest which is false as per the statement of the reason or it should be able to return to its initial position which requires a change in velocity. Hence, reason is correct.