# Homework Help: Calculating distance given total work?

1. Mar 28, 2015

### heythere1010

1. The problem statement, all variables and given/known data
The total work done is 2.42 * 10^4 J (work is from friction and person pulling a sled). The force of the person pulling is 135 N and the force of friction is 67 N. The angle on the sled is 48.

2. Relevant equations

W=f*d*cos0

3. The attempt at a solution

I was thinking I would need to do the Wt=f*dcos0 + f*dcos0

24200=135*d*cos 48 + 67*d*cos 180

I did this, but the answer was incorrect. the answer is 963 m.

2. Mar 29, 2015

### SammyS

Staff Emeritus
Start by drawing a free body diagram.

3. Mar 29, 2015

### heythere1010

Yes, the question has given that.

4. Mar 29, 2015

### SammyS

Staff Emeritus
In what direction is the frictional force, relative to the direction of travel?

5. Mar 29, 2015

### heythere1010

The force of friction is west and the travelling direction is east.

6. Mar 29, 2015

### SammyS

Staff Emeritus
Then, does friction do positive work, or does it do negative work ?