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Physics 6A Ch10Worksheet

# Physics 6A Ch10Worksheet - Physics 6A Ch 10 In Class...

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www.clas.ucsb.edu/staff/vince Physics 6A Ch. 10 – In Class Worksheet 1) Two helms-women, in disagreement about which way to turn a ship, exert the forces shown below on a ship’s wheel. The wheel has a radius of 0.74 m, and the two forces have the magnitudes F 1 =72 N and F 2 = 58N. Find (a) the torque caused by F 1 and (b) the torque caused by F 2 . (c) In which direction does the wheel turn as a result of these two forces? 2) A person holds his outstretched arm at rest in a horizontal position. The mass of the arm is m and its length is 0.740 m. When the person releases his arm, allowing it to drop freely, it begins to rotate about the shoulder joint. Find (a) the initial angular acceleration of the arm and (b) the initial linear acceleration of the man’s hand. Assume the arm is a uniform rod, with the axis at one end. 3) A child of mass m is supported on a light plank by his parents, who exert forces F 1 and F 2 as indicated. Find the forces required to keep the plank in static equilibrium. Use the right end of the plank as the axis of rotation.

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