Power Work done

• Wd = Fs

  work done linear = force x displacement
• P = Wd/t

  Power linear = work done x time
• P = Fv

  Power linear = force x velocity
• $Wd =$$T\theta$


  Work done Angular = Torque x Angular displacement
• $P =$$T\omega$


  Power angular = Torque x Angular velocity
• $Eff=$$P_{out}/P_{in}$


  Efficiency = power out / power in
• WD = Fs

  Work done = Force x displacement
• 1 Nm = 1 J
• Wd in Joules J
• Power in watts W
• 1 J / s = 1 W
• $E_p =$$mgh$


  Potential Energy = mass x gravity x height
• $E_p =$$E_k$


  Potential energy = Kinetic energy
• $Ek_{rot}=$$\frac{1}{2}I\omega^2$


  Rotational Kinetic energy = 0.5 x moment of inertia x angular velocity ^2
• $Ek_{linear} =$$\frac {1}{2} mv^2$


  Linear kinetic energy = 0.5 x mass x velocity ^2
• To solve angular power questions first solve Torque and how many revolutions and convert to radians