rotational speed
Revolutions per minute
Rotational speed is how fast something spins, measured in revolutions per unit of time—typically revolutions per minute (RPM) or revolutions per second.
Engine performance depends on rotational speed: The motor runs at 3,000 RPM.
Also called rotational velocity, though speed technically ignores direction while velocity includes it.
- turbineBlade-driven energy converter
- wind turbineKinetic air energy converter
- tachometerRotational speed indicator
- circular motionTravel along curved path
- torqueRotational force measurement
RPM · spin · spinning top · turn · angular acceleration · Hertz · revolutions · moment of inertia · wheel · gear ratio · twirl · figure skater · centrifugation · cycle time · balancing · Coriolis force · dizzying · washing machine