# Kinematics in two dimensions of golf ball

1. Sep 23, 2008

### goodcoverage

A golfer imparts a speed of 30.3 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) how much time does the ball spend in the air? (b) What is the longest "hole in one" that the golfer can make, if the ball does not roll when it hits the green?

So I have been working on this problem all day and have gone in circles. Can anyone give me an advice on how to solve or any ideas?

2. Sep 23, 2008

### LowlyPion

Welcome to PF.

What angle do you think gives the best distance?

3. Sep 23, 2008

### goodcoverage

45 degrees?

4. Sep 23, 2008

### LowlyPion

OK how long is the ball in the air if the vertical component is V*sin45 then?

Then take that time and multiply by the horizontal component of velocity which is VCos45. That's how far it goes.

5. Sep 23, 2008

### goodcoverage

but what if i don't know the vertical velocity?

6. Sep 23, 2008

### LowlyPion

I just gave it to you.

7. Sep 23, 2008

### goodcoverage

oh i think i get you now. thank you so much!