Question

as a person pushes a box across a floor, the energy from the persons moving arm is transferred to the box, and the box and the floor become warm. during this process, what happens to energy? it is increased. it is conserved. it is decreased. it is created.

Explanation:

The law of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed. In this case, the energy from the person's arm is transferred to the box (as kinetic energy) and also transformed into heat (due to friction, making the box and floor warm). So the total energy in the system (person + box + floor) remains the same.

Answer:

It is conserved.