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Chapter 12: Q. 34 (page 331)
A 500g, 8-cm-diameter can is filled with uniform, dense food. It rolls across the floor at 1.0 m/s. What is the can's kinetic energy?
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Calculate the moment of inertia of the rectangular plate in FIGURE P12.54 for rotation
about a perpendicular axis through the center.
A 100g ball and a 200 g ball are connected by a , 30- cm long massless, rigid rod. The balls rotate about their center of mass at 120 rpm. What is the speed of the 100 g ball?
In FIGURE CP12.88, a 200 g toy car is placed on a narrow 60-cm-diameter track with wheel grooves that keep the car going in a circle. The 1.0 kg track is free to turn on a frictionless, vertical axis. The spokes have negligible mass. After the car鈥檚 switch is turned on, it soon reaches a steady speed of 0.75 m/s relative to the track. What then is the track鈥檚 angular velocity, in rpm?
The 5.0 kg, 60-cm-diameter disk in FIGURE P12.72 rotates on an axle passing
through one edge. The axle is parallel to the floor. The cylinder is held with the
center of mass at the same height as the axle, then released.
a. What is the cylinder鈥檚 initial angular acceleration?
b. What is the cylinder鈥檚 angular velocity when it is directly below the axle?
The two objects in FIGURE EX12.29 are balanced on the pivot. What is distance ?
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