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Chapter 12: Q. 26 (page 331)
A 1.0 kg ball and a 2.0kg ball are connected by a 1.0 m rigid, massless rod. The rod is rotating about its center of mass at 20 rpm. What net torque will bring the balls to a halt in 5.0 s?
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The three 200g masses in FIGURE rigid rods.
a. What is the triangle's moment of inertia about the axis through the
b. What is the triangle's kinetic energy if it rotates about the axis
A drum major twirls a 96 -cm-long, 400g baton about its center of mass at 100 rpm. What is the baton's rotational kinetic energy?
Evaluate the cross products and . (part )
The 3.0-m-long, 100 kg rigid beam of FIGURE EX12.31 is supported at each end. An 80 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?
A 40 kg, 5.0-m-long beam is supported by, but not attached to, the two posts in Figure P12.60. A 20 kg boy starts walking along the beam. How close can he get to the right end of the beam without it falling over?
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