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Engineering ToolBox > Angular Motion - Power and Torque

Angular velocity and acceleration - power and torque

Power for a Body in Angular Motion

The power of a rotating body can be expressed as

P = T ω (1)

where

P = power (W)

T = torque or moment (Nm)

ω = angular velocity (rad/s)

Torque for a Body in Angular Motion

T = I α  (2)

where

I = moment of inertia (kg m², lb_m ft²)

α = angular acceleration (rad/s²)