Ajuggler throws a ball straight up into the air. the ball remains in the air for a time (t) before it lands back in the jugglers hand. what is the acceleration of the ball during the entire time the ball is in the air?

, downward

Explanation:

There is only one force acting on the ball during its motion: the force of gravity, which is given by

where

m is the mass of the ball

is the acceleration of gravity (downward)

According to Newton's second law,

where F is the net force on the object and a is its acceleration. Rearranging for a,

As we said, the only force acting on the ball is gravity, so F = mg and the acceleration of the ball is:

Therefore, the ball has a constant acceleration of downward for the entire motion.

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