How do I find the amount heat energy generated from pushing a crate?

[pokeefer]

Homework Statement

A force of 120N pushes a crate of mass 15 kg along the ground at a constant speed of 3.2 m/s for a distance of 6.2m. What amount of heat energy was generated during this time?

Homework Equations

W = Fd
KE + PE = KE ' + PE '

The Attempt at a Solution

I don't know if the law of conservation of energy still applies somehow.

 

[kjohnson]

Homework Statement

A force of 120N pushes a crate of mass 15 kg along the ground at a constant speed of

If its pushed at a constant speed what other force must be acting on the crate?

 

[pokeefer]

If its pushed at a constant speed what other force must be acting on the crate?

I'm guessing the force of friction.

But would I be able to solve for heat energy by:

Work = Change in kinetic energy

Then finding the initial kinetic energy and then

Ke Final = Work - Ke initial

Ke Final = Fd - 1/2 mv^2

?

 

[kjohnson]

Since friction is not a conservative force that means that energy is being dissipated or lost from the system. So you want to make the assumption that the energy lost because of friction is...