Q: The pulley in Fig. P9.75 has radius R and
The pulley in Fig. P9.75 has radius R and a moment of inertia I. The rope does not slip over the pulley, and the pulley spins on a frictionless axle. The coefficient of kinetic friction between block...
See AnswerQ: Two metal disks, one with radius R1 = 2.50
Two metal disks, one with radius R1 = 2.50 cm and mass M1 = 0.80 kg and the other with radius R2 = 5.00 cm and mass M2 = 1.60 kg, are welded together and mounted on a frictionless axis through their c...
See AnswerQ: In the system shown in Fig. 9.17, a
In the system shown in Fig. 9.17, a 12.0-kg mass is released from rest and falls, causing the uniform 10.0-kg cylinder of diameter 30.0 cm to turn about a frictionless axle through its center. How far...
See AnswerQ: In Fig. P9.80, the cylinder and pulley turn
In Fig. P9.80, the cylinder and pulley turn without friction about stationary horizontal axles that pass through their centers. A light rope is wrapped around the cylinder, passes over the pulley, and...
See AnswerQ: If a person of mass M simply moved forward with speed V
If a person of mass M simply moved forward with speed V, his kinetic energy would be 1/2 MV2. However, in addition to possessing a forward motion, various parts of his body (such as the arms and legs)...
See AnswerQ: A baseball is thrown from the roof of a 22.0
A baseball is thrown from the roof of a 22.0-m-tall building with an initial velocity of magnitude 12.0 m/s and directed at an angle of 53.1° above the horizontal. (a) What is the speed of the ball ju...
See AnswerQ: The potential energy of a pair of hydrogen atoms separated by a
The potential energy of a pair of hydrogen atoms separated by a large distance x is given by U(x)= -C6>x6, where C6 is a positive constant. What is the force that one atom exerts on the other? Is this...
See AnswerQ: Using Problem 9.81 as a guide, apply it to
Using Problem 9.81 as a guide, apply it to a person running at 12 km/h, with his arms and legs each swinging through ±30° in 1/2 s. As before, assume that the arms and legs are kept straight. Data f...
See AnswerQ: A dancer is spinning at 72 rpm about an axis through her
A dancer is spinning at 72 rpm about an axis through her center with her arms outstretched (Fig. P9.83). From biomedical measurements, the typical distribution of mass in a human body is as follows: H...
See AnswerQ: A thin, uniform rod is bent into a square of side
A thin, uniform rod is bent into a square of side length a. If the total mass is M, find the moment of inertia about an axis through the center and perpendicular to the plane of the square.
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