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Angular Work & Power

Physics: AQA A Level, topic 11.1.6

Angular Work and Power

A torque which rotates an object must do work against friction.

Work

Work

  • As an object rotates work is done to overcome the resistive frictional forces acting on it.
  • The equation for work done is:
  • Work = torque x angle turned through
  • W=TθW=T\theta
Power

Power

  • As work is done to turn an object power is dissipated in the form of heat or sound energy.
  • The equation for power is:
  • Power = torque x angular velocity
  • P=TωP=T\omega

Test yourself on Angular Work & Power

  • What is the equation for angular work?

  • What is the equation for angular power

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