Question

How do you define RPM (revolutions per minute)?
Options
O The speed at which the engine crankshaft is turning
O The speed at which the break is applied
O The speed at which the steering is turning
O The speed at which the piston is working​

Answer 1

Answer:

Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis.