Multiple choice general knowledge science & technology

When a person uses a simple machine, such as a lever or a pulley, the work or energy output from the simple machine can never be higher than the work or energy input by the person using the simple machine (neglect any potential energy that may have been previously stored in the machine).

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The law of conservation of energy states that energy cannot be created or destroyed. A simple machine can only transform energy, never output more than was input. In reality, some input energy is always lost to friction, heat, sound, and deformation, making output energy strictly less than input.

Keep practicing — related questions