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Unformatted text preview: 2. If the system is rotating at 30 rpm, find the kinetic energy of the system in question 1 if the system is rotating about an axis that is perpendicular to the rod and passing through the rod a.) at one end of the rod. b.) at the center of the rod c.) at a point ¼ the length from the center. 3. Two hanging masses m 1 = 25 kg and m 2 = 20 kg are tied to a string, of negligible mass,which passes over a pulley. The masses are at the same height when released from rest. What is the magnitude of the velocity of the two masses after m 1 has dropped a distance of 0.5 meters? Treat the pulley as a thin disk of mass of 10 kg and a radius of 5.0 cm. 4. A rod has mass M and length L and a uniform density. Calculate the moment of inertia using: a.) I = ∫ r 2 dm b.) the parallel axis theorem....
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