# Help on Free Body Diagram

1. Dec 10, 2008

### fishguts

I am having problems with a couple of homework questions. IF anyone can help out that would be great.

1. The problem statement, all variables and given/known data

Neglect air resistance in this problem. Mark all that apply when answering each question.
Which forces should be included in the free body diagram for a baseball at the moment it is hit by the bat?

1. the force of gravity on the ball
2. the force of the glove on the bat
3. the force of the bat on the ball
4. the force of the ball on the bat
5. the force of gravity on the bat

2. Relevant equations

N/A

3. The attempt at a solution

I though the correct answer would be options 1, 3, 4, 5 because all these forces play a part in what is happening at the time when the ball is struck by the bat. My selections were incorrect though. Can anyone offer me any tips to correct the problem?

2. Dec 10, 2008

### mukundpa

Free body diagram of ball or bat?

3. Dec 10, 2008

### fishguts

It is the free body diagram for a baseball at the moment it is hit by the bat

4. Dec 10, 2008

### mukundpa

So we have to consider all forces that acts on the baseball not on the bat.

5. Dec 10, 2008

### fishguts

So then the correct answer should be 1 and 3 since every other option has foces actiong on the bat?

6. Dec 10, 2008

### mukundpa

I think that is right.

7. Dec 10, 2008

### fishguts

Yup it is correct thanks for the help

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook