Question

Darryl throws a basketball at the gym floor.The ball bounces once on the floor comes to rest in his coach's hands.At which point are all the forces on the basketball balanced?
a.the moment the ball leaves Darryl's handB.the moment the ball touches the floorC.when the ball is in the airD.when the ball starts falling downward before coming to restE.the moment the ball comes to complete rest

Answer 1

B. The Moment the ball touches the floor.

Answer 2

Answer:

E.the moment the ball comes to complete rest

Explanation:

The position of basket ball is said to be at balanced position when net force on the basket ball is zero and its velocity is not changing with time.

So here when ball starts to fall then the velocity will start increasing so this is not balanced situation.

When ball touches the floor then after that ball rebound in opposite direction so this is also unbalanced situation as velocity is changing here.

When ball is moving in air then due to gravity the speed is continuously changing so it is also unbalanced situation.

So here the correct balanced position is when ball comes to rest in the hand of the man because after that its velocity is not changing.