PHYSICS2, help!

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A string is wrapped around the rim of a flywheel 0.400 m in radius, and a steady pull of 50.0 N is exerted on the cord. The wheel is mounted in frictionless bearings on a horizontal shaft through it's center. The moment of inertia of the wheel is 4.00 kg.m^2 .Calculate the angular acceleration of the wheel.

  • PHYSICS2, help! -

    Read up examples in
    http://spiff.rit.edu/classes/phys211/lectures/rotke/rotke_all.html
    one of which is similar to this one.

    After this, you can attempt the previous problem you posted, together with your previous knowledge of kinematics and energy principles.

  • PHYSICS2, help! -

    The torque T = 50N*0.4m
    = 20N.m
    The moment of inertia is I = 4.00kg.m^2.
    The angular acceleration in rad/s^2 alpha = T/I
    =20N.m/(4.00kg/m^2)
    =5 rad/s^2

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