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Question
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)
Responses
The lost energy cannot be recovered.
The lost energy cannot be recovered.
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 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 lost energy is caused by friction.
The lost energy is caused by friction.
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1 answer
The correct response that aligns with the Law of Conservation of Energy is:
The lost energy is not truly lost, but it changed into a different form.
This principle indicates that energy cannot be created or destroyed, only transformed from one form to another (e.g., from mechanical energy to thermal energy due to friction).
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