#### A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, and her takeoff point is 1.80 m above the pool.

#### (a) How long are her feet in the air?

#### (b) What is her highest point above the board?

#### (c) What is her velocity when her feet hit the water?

**Solution:**

The known values are:

### Part A

Based from the knowns, the formula most applicable to solve for the time is . If we rearrange the formula by solving for t, and substitute the given values, we have

### Part B

We have the formula

### Part C

The formula to be used is

Since the diver must be moving in the negative direction,