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physics

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An athlete at the gym holds a 5.29 kg steel ball in his hand. His arm is 67.0 cm long and has a mass of 4.57 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?

  • physics -

    You have to assume a cg for the arm. Assuming midway...

    4.57*67/2+5.29*67 in N-cm of torque

  • physics -

    What is the magnitude of the torque about his shoulder if he holds his arm straight, but 43.8° below horizontal?

    I tried multiplying the torque force by sin43.8 but it was wrong :(

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