# Tennis Player Tosses A Tennis Ball Straight Up

1. Jan 29, 2012

### 503gurl

1. The problem statement, all variables and given/known data
A tennis player tosses a tennis ball straight up and then catches it after 2.00 s at the same height as the point of release. (a) what is the acceleration of the ball while it is in flight? (b) what is the velocity of the ball when it reaches its maximum height? Find (c) the initial velocity of the ball and (d) the maximum height it reaches.

2. Relevant equations

3. The attempt at a solution

2. Jan 29, 2012

### Froster78

Have you tried anything thus far? What equations do you know that relate your unknown variables?

3. Jan 29, 2012

### 503gurl

I honestly do not know where to start... I'm so lost in physics right now.

4. Jan 29, 2012

### Froster78

I would assume you are to neglect air resistance so a good place to start would be constant acceleration formulas.

5. Jan 29, 2012

### 503gurl

a= v-v0/t ?.

6. Jan 29, 2012

### Froster78

that sounds good... you know your v after t=2...

Last edited: Jan 29, 2012
7. Jan 29, 2012

### 503gurl

I don't know my velocity though

8. Jan 29, 2012

### Froster78

what is your v at t=2?

9. Jan 29, 2012

### 503gurl

Zero? Right because the ball is caught after 2 seconds in the same position it was thrown...

10. Jan 29, 2012

### Froster78

Spot on! now you have only v0 and a to find, there might be some other formulas that you can compare to this one. Keep going and you'll figure it out.

11. Jan 29, 2012

### 503gurl

THANK YOU SO MUCH "Froster78" your help is greatly appreciated! :)

12. Jan 29, 2012

### Froster78

No problem!

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