#### A soft tennis ball is dropped onto a hard floor from a height of 1.50 m and rebounds to a height of 1.10 m.

#### (a) Calculate its velocity just before it strikes the floor.

#### (b) Calculate its velocity just after it leaves the floor on its way back up.

#### (c) Calculate its acceleration during contact with the floor if that contact lasts 3.50 ms (0.0035 s).

#### (d) How much did the ball compress during its collision with the floor, assuming the floor is absolutely rigid?

**Solution:**

**Part A**

This problem is the same as Problem 2.56. The velocity of the ball when it strikes the ground is

**Part B**

The velocity of the ball just after it leaves the floor on its way back up

upward

**Part C**

The acceleration is

**Part D**