3 masses on a pulley system
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A mass on a stick has the same moment of inertia as a thin hoop: I = mr2 I = (1.05 kg)(.900)2 = 0.8505 kgm2. If the mass is moving at a constant angular velocity, then it is not accelerating, and the only necessary torque merely cancels out the torque applied by the frictional force of...
•13-1. The casting has a mass of 3 Mg. Suspended in a vertical position and initially at rest, it is given an upward speed of 200 13-15. The 3.5-Mg engine is suspended from a spreader beam having a negligible mass and is hoisted by a crane which exerts a Neglect the mass of the motor and pulleys.