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Math Help - Frictional Torque

  1. #1
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    Frictional Torque

    A mass of 0.5 kg is suspended from a flywheel
    If the mass is released from rest and falls a distance of 0.5 m in 1.5 s,
    Mass of wheel = 3 kg
    Outside radius of wheel = 300 mm
    Radius of gyration = 212 mm
    calculate:
    (a) The linear acceleration of the mass. For this I got0.22ms^-2
    (b) The angular acceleration of the wheel. For this I got 1.467 rad s^-2
    (c) The tension in the rope. 4.96N
    (d) The frictional torque, resisting motion. Providing my answers are correct for a, b and c how do I solve d? Also if someone can confirm my work till now is correct please that would be great.......
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  2. #2
    Forum Admin topsquark's Avatar
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    Re: Frictional Torque

    Quote Originally Posted by Jock View Post
    A mass of 0.5 kg is suspended from a flywheel
    If the mass is released from rest and falls a distance of 0.5 m in 1.5 s,
    Mass of wheel = 3 kg
    Outside radius of wheel = 300 mm
    Radius of gyration = 212 mm
    calculate:
    (a) The linear acceleration of the mass. For this I got0.22ms^-2
    (b) The angular acceleration of the wheel. For this I got 1.467 rad s^-2
    (c) The tension in the rope. 4.96N
    (d) The frictional torque, resisting motion. Providing my answers are correct for a, b and c how do I solve d? Also if someone can confirm my work till now is correct please that would be great.......
    What have you tried so far?

    -Dan
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  3. #3
    Junior Member
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    Re: Frictional Torque

    Came up with a figure but not sure its correct.....I got 1.209. Are the rest correct that I already have?
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