as a person pushes a box across a floor, the energy from the persons moving arm is transferred to the box…

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?\nit is increased.\nit is conserved.\nit is decreased.\nit is created.
Answer
Brief Explanations:
According to the law of conservation of energy, energy cannot be created or destroyed, only transformed from one form to another. In this case, the mechanical energy of the person's arm is transformed into kinetic energy of the box and thermal energy due to friction between the box and the floor.
Answer:
It is conserved.