If you throw a ball against the ceiling-so the ball moves upward and then rebounds to move downward-at the instant the ball hits the ceiling, the acceleration is If you throw a ball against the ceiling-so the ball moves upward and then rebounds to move downward-at the instant the ball hits the ceiling, the acceleration is Zero. Positive. Negative.

Question

Jaqueline Hess

Physics

31 August, 11:45

If you throw a ball against the ceiling-so the ball moves upward and then rebounds to move downward-at the instant the ball hits the ceiling, the acceleration is If you throw a ball against the ceiling-so the ball moves upward and then rebounds to move downward-at the instant the ball hits the ceiling, the acceleration is Zero. Positive. Negative.

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Answers (1)

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Tyshawn Ashley · Answer 1

The acceleration is Zero

Explanation:

When the ball is thrown upward, its motion is against gravity and the gravitational force. Hence, it has its acceleration as - g.

The very instant that the ball hits the ceiling is the moment it's upward motion stops.

Hence, in that instant, it is motionless or static.

If it is static, then, definitely, velocity is Zero and acceleration is also Zero.

However, after the ball hits the ceiling, it begins to fall back to the ground. It falls in the same direction as the gravitational force and so, its acceleration is + g.