Question

lenore is on an inclined plane next to her truck. holding her hands steady, she pushes a box up the plane and into her truck. where can energy be lost? (1 point)
friction between lenore and the ground.
friction between the box and the inclined plane.
friction between the truck and the inclined plane.
friction between lenores hands and the box.

Explanation:

When pushing a box up an inclined plane, friction between the box and the inclined plane opposes the motion. This frictional force does work against the motion of the box. According to the work - energy principle, the work done by friction is dissipated as heat energy. So, energy is lost due to this frictional interaction.

• Friction between Lenore and the ground is not relevant as she is holding her hands steady and the focus is on the box's motion.
• Friction between the truck and the inclined plane is not involved in the energy loss related to pushing the box up (the truck is stationary in this context).
• Friction between Lenore's hands and the box is not the main source of energy loss for the system related to moving the box up the plane (assuming she is pushing it without slipping too much in a way that would majorly affect the box's motion up the plane compared to the box - plane friction).

Answer:

Friction between the box and the inclined plane.