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Unformatted text preview: velocity of the block after the pulley rotates 5 revolu k tions. Ans : 3.15 m/s 36.87 k = 0.25 A B 2.5 m 1 m/s 1 m/s CHANG 3 Two blocks A ( m A = 8 Kg) and B ( m B = 1 Kg) are connected by a cable over a pulley ( m B 2 eed P = 4 Kg), and the blocks are released with an initial sp = 1 m/s as shown. The radius of the pulley is R = 0.1 m and it can be treated as a disk pivoted at the center. Find the velocity of the blocks just before B strikes the floor. Ans : 3.67 m/s Conservation of angular momentum Y&F 10.86 **(a) only** Ans : (a) 0.785 rad/s Y&F 10.47 **(a) only** Ans : (a) 5.88 rad/s 0.5 m 0.75 m CHANG 4 A lump of 2 Kg putty with speed is thrown toward the 8 Kg rod initially at rest. If the energy loss is 300 J during the collision, find the initial speed of the putty. Ans : 20 m/s Y&F 10.92 Ans : 0.440 m...
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