Physics · Simple Machines

If the efficiency of a machine is 80%, what does it mean?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1There is a 20% loss of input energy in the machine.✓
2Both the velocity ratio and the mechanical advantage of the machine are equal to 80.
3There is no loss of input energy in the machine.
4The machine gives more output than the input.

Correct answer

There is a 20% loss of input energy in the machine.

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