Originally Posted by

**rcmango** might need help just setting up a diagram, with the angles, i believe i n need that.

Then i can use the equation W = (F*cos theta) * s

where s is the distance.

thanks for any help with this one.

heres the problem:

A 44 kg box is being pushed a distance of 7.0 m across the floor by a force whose magnitude is 157 N.

And the force is parallel to the displacement of the box.

The coefficient of kinetic friction is 0.25.

I must use the proper + and - signs for the work by each force of:

applied force: in Joules

frictional force: in Joules

normal force: in Joules

gravity: in Joules

also, since i have different Joules for each force, the equation should change, so what variable would be the changing variable in the equation?

thanks alot for any extra help for this one.