Question

Oiling bicycle chains or chainsaws is efficient at making the machines work better because the oil reduces _________________________. (1 point)
Responses

Mechanical advantage
Mechanical advantage

Friction
Friction

The number of revolutions the chain needs to do around the gears
The number of revolutions the chain needs to do around the gears

Efficiency

Answer 1

Oiling bicycle chains or chainsaws is efficient at making the machines work better because the oil reduces **friction**.