A ball is thrown straight up. While it is still travelling upward, which of the

Question

A ball is thrown straight up. While it is still travelling upward, which of the following statements is true?

Question 10 options:

Its velocity points up and its acceleration points up.

Its velocity points up and its acceleration points down.

Its velocity points down and its acceleration points up.

Its velocity points down and its acceleration points down.

The ball's velocity and acceleration are zero at all times.

Its velocity points up and its acceleration points up.

Its velocity points up and its acceleration points down.

Its velocity points down and its acceleration points up.

Its velocity points down and its acceleration points down.

The ball's velocity and acceleration are zero at all times.

Explanation / Answer

b) Its velocity points up and its acceleration points down

This is because at the highest point in its motion, the ball's velocity is zero hence it is continually decelerating hence velocity points upwards and acceleration downwards.

The ball has an initial velocity upwards, but the only force acting on the ball once it has left your hand is gravity.

Once the ball leaves your hand, it is moving upwards, but getting slower and slower, i.e. it is decelerating (or accelerating downwards). This deceleration is caused by gravity, a force acting downwards.

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