Assertion: A bullet is fired vertically upwards. After five seconds it returns to the point of firing. The net displacement of the bullet is zero.
Reason: The rate of change of velocity with time is constant throughout the motion of the bullet.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C. If Assertion is true but the Reason is false
D. If both Assertion and Reason are false

Answer

C

Explanation

Since the bullet returns to its point of projection, it net displacement is zerol. The bullet is falling freely under the action of gravity. The magnitude of the rate of change of velocity is constant. However, the direction is negative for the upward motion and positive when the bullet is falling.