1000 joules of energy are put into a pulley system, and 400 joules come out. What does the Law of Conservation of Energy imply about the lost energy?(1 point)

Question

Responses

The pulley system could be improved to conserve some of the lost energy.
The pulley system could be improved to conserve some of the lost energy.

The lost energy is caused by friction.
The lost energy is caused by friction.

The lost energy cannot be recovered.
The lost energy cannot be recovered.

The lost energy is not truly lost, but it changed into a different form.

Answer 1

The correct response is:

The lost energy is not truly lost, but it changed into a different form.

This aligns with the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transformed from one form to another. In the case of the pulley system, the energy that was not output (600 joules) has likely been transformed into other forms, such as heat due to friction and sound energy.