An x-t graph is drawn for a ball moving in one direction.The graph starts at the origin and at t = 6 s the velocity of the ball is zero.We can be positive that at t = 6 s,
A) the slope of the curve is non-zero.
B) the acceleration is constant.
C) the ball has stopped.
D) none of the above answers is always correct.

Question

Quizplus · Accepted Answer

At t = 6 s, the velocity of the ball is zero. This means that the slope of the x-t graph is zero at that point. The acceleration is the rate of change of velocity, so if the velocity is zero, the acceleration must also be zero. Therefore, the ball has stopped at t = 6 s.

An X-T Graph Is Drawn for a Ball Moving in One