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Torque calculation

  1. Jan 1, 2009 #1
    i am making a car and i will use hub motor on it.

    i want the car to reach 40 km/h in 1 min.
    so i need to calculate the required torque for the hub motor to move the car and make the car to reach required speed.

    what are the equations to calculate this?

    thank you for your help

  2. jcsd
  3. Jan 3, 2009 #2
    calculate the acceleration required. Torque requirement is the frictional torque(at bearings, wheels etc) plus the inertia torque of the system.
  4. Jan 4, 2009 #3
    is there any source that i can find the equations about it ?

    thank you for your help.
  5. Jan 4, 2009 #4
    use a = dv/dt to calculate the acceleration. Required force is the inertial force m*a plus the friction
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