# Homework Help: The Work Done in Pulling a Supertanker

1. Jul 23, 2009

### rock_star

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

Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.90×10^6 N , one at an angle 13.0 degrees west of north, and the other at an angle 13.0 degrees east of north, as they pull the tanker a distance 0.840 km toward the north.

2. Relevant equations

3. The attempt at a solution

2 * (1.90×10^6 N) * cos(13) * 0.84 * 10^3 = 2.9 * 10 ^9

can anyone tell me where I did a mistake?

Thanks a lot before hand

2. Jul 23, 2009

### rock.freak667

It does not look like you made a mistake.

3. Jul 23, 2009

### turin

Solution to what?

4. Jul 23, 2009

### rock_star

It is showed that I made a mistake :(
Rounding error..
It is 3.11 not 2.9 :(

Thanks a lot though! :)

Last edited: Jul 23, 2009
5. Jul 23, 2009

### Woolie

The correct answer is 3.11E+9. Make sure you use 13 DEGREES and not 13 RADIANS. If you entered into a *dumb* calculator, it usually assumes radians. Try writing