Question

darryl throws a basketball at the gym floor. the ball bounces once on the floor and comes to rest in his coachs hands. at which point are all the forces on the basketball balanced?
a. the moment the ball leaves darryls hand
b. the moment the ball touches the floor
c. when the ball is in the air
d. when the ball starts falling downward before coming to rest
e. the moment the ball comes to a complete rest

Explanation:

When an object is at rest, the net - force acting on it is zero, meaning all forces are balanced. In the given scenarios, only when the ball comes to a complete rest (either in the coach's hands or at any other fully stationary state) are the forces balanced. At other times like when it leaves the hand, touches the floor, is in the air or falling, there are unbalanced forces such as gravity, normal force, and air - resistance causing acceleration or change in motion.

Answer:

E. the moment the ball comes to a complete rest