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

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

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

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

Answer 1

The correct response is:

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

According to the Law of Conservation of Energy, energy cannot be created or destroyed; it can only change forms. In this case, the energy that was "lost" in the pulley system likely transformed into heat or sound due to inefficiencies such as friction or other forms of energy dissipation.