11. A ball is thrown directly upward, as pictured to the right, where the arrow

Question

11. A ball is thrown directly upward, as pictured to the right, where the arrow in dicates the ball's velocity vector. What statement is true about the direction of the ball's acceleration when the ball is at the top of its peak (Point 2 in the picture)? a) The acceleration is down. b) The acceleration is up. c) The acceleration is to the left. d) The acceleration is to the right The acceleration is zero. 12. A ball is thrown directly upward, as pictured above, where the arrow indicates the ball's velocity vector. What statement is true about the direction of the ball's acceleration when the ball is travelling down (Point 3 in the picture)? a) The acceleration is down. b) The acceleration is up c) The acceleration is to the left d) The acceleration is to the right The acceleration is zero An gbiest is launchad off a cliff with a horizontal velocity of 12 m/s and a vertical

Explanation / Answer

We know that the acceleration is rate of change of velocity

as the ball is moving upward due to the gravitational force on the ball the velocity of the ball goes on decreasinf so that the acceleration direction of the ball is down ward indicating decreasing
answer is option a. The acceleration is down

and

when the ball is moving downward from say zero velocity , so that the acceleration is also zero there and due to gravitaional force of attraction , ball moves to accelerate down ward that is , it has positive acceleration(increasing velocity) so the direction of the acceleration is upward (magnitude)

anser is

b.
The acceleration is up

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