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?
a Friction between Lenore and the ground.
b Friction between the truck and the inclined plane.
c Friction between Lenore’s hands and the box.
d Friction between the box and the inclined plane.
The correct options where energy can be lost are:
- Friction between Lenore and the ground (option a): Some of the energy that Lenore exerts while pushing the box up the inclined plane can be lost to the friction between her feet and the ground.
- Friction between Lenore's hands and the box (option c): Some energy can be lost to friction between Lenore's hands and the box as she pushes it up the inclined plane.
- Friction between the box and the inclined plane (option d): Energy can also be lost to the friction between the box and the inclined plane as it moves up and into the truck.
Therefore, options (a), (c), and (d) are correct. Energy can be lost due to friction between Lenore and the ground, friction between Lenore's hands and the box, and friction between the box and the inclined plane.