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Physics (Angular Momentum)

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A solid ball of radius 10cm and mas 8kg rolls in the y direction with a speed of 10 m/s At the instant that it is 3m from the origin along the x axis, what is the angular momentum (mag + direction) about its center of mass?

  • Physics (Angular Momentum) -

    Use the information on mass, radius and solidity to get the moment of intertia.
    I = (2/5)M*R^2 = 0.0064 kg*m^2

    The angular speed is
    w = V/R = 10 m/s/0.1 m
    = 100 rad/s

    The angular momentum about the center is I*w

    Where it is does not matter

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