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quiz3Ab physics

# quiz3Ab physics - Physics 1A 9 AM class Quiz 3 Nov 16 2007...

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Physics 1A- 9 AM class Quiz # 3 Nov. 16, 2007 Prof. Jose Onuchic MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Figure 1 A system comprising blocks, a light frictionless pulley, and connecting ropes is shown. The 9 kg block is on a smooth horizontal table ( m = 0). The surfaces of the 12 kg block are rough, with m = 0.30. 1) In Figure 1, mass M is set at 5.0 kg. It accelerates downward when it is released. The acceleration of mass M is closest to: A) 1.6 m/s 2 B) 1.0 m/s 2 C) 1.8 m/s 2 D) 1.2 m/s 2 E) 1.4 m/s 2 Figure 2 A 2.5 kg, sliding on a rough surface, has a speed of 1.2 m/s when it makes contact with a spring. The block comes to a momentary halt when the compression of the spring is 5.0 cm. The work done by the friction, from the instant the block makes contact with the spring until is comes to a momentary halt, is -0.50 J. 2) In Figure 2, after compressing the spring, the block moves away from it. The speed of the block, upon

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quiz3Ab physics - Physics 1A 9 AM class Quiz 3 Nov 16 2007...

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