A ball is thrown straight up in the air. For which situation are both the instantaneous velocity and the acceleration zero?

Question

A ball is thrown straight up in the air. For which situation are both the instantaneous velocity and the acceleration zero? (A) on the way up (B) at the top of its flight path (C) halfway up and halfway down (D) none of the above

Tardigrade Admin · Accepted Answer

Once the ball has left the thrower’s hand, it is a freely falling body with a constant, nonzero, acceleration of a = -g. Since the acceleration of the ball is not zero at any point on its trajectory, choices (a) through (c) are all false and the correct response is (d).

Q. A ball is thrown straight up in the air. For which situation are both the instantaneous velocity and the acceleration zero?

on the way up

at the top of its flight path

halfway up and halfway down

none of the above

Once the ball has left the thrower’s hand, it is a freely falling body with a constant, nonzero, acceleration of $a = - g$ . Since the acceleration of the ball is not zero at any point on its trajectory, choices (a) through (c) are all false and the correct response is (d).

Q. A ball is thrown straight up in the air. For which situation are both the instantaneous velocity and the acceleration zero?

on the way up

at the top of its flight path

halfway up and halfway down

none of the above

Once the ball has left the thrower’s hand, it is a freely falling body with a constant, nonzero, acceleration of a=−g. Since the acceleration of the ball is not zero at any point on its trajectory, choices (a) through (c) are all false and the correct response is (d).

Once the ball has left the thrower’s hand, it is a freely falling body with a constant, nonzero, acceleration of $a = - g$ . Since the acceleration of the ball is not zero at any point on its trajectory, choices (a) through (c) are all false and the correct response is (d).