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2007s_f

# 2007s_f - Physics 2101 Final Exam Spring 2007 Name...

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Problem 1 - 13 points Two blocks of masses M and 2M are connected to a spring of constant k that has one end fixed, as shown in the figure. The horizontal surface and the pulley are frictionless, and the pulley has negligible mass. The blocks are released with the spring relaxed. (a) (3 pts) Write an expression for the work done by gravity on the M hanging block when it reaches the lowest position, a distance H below its initial position, where it momentarily stops. Your expression should be in terms of M, g, H and numerical constants. (b) (4 pts) Write an expression for the work done by the spring when the M block reaches the lowest position, using k, H and numerical constants. (c) (6 pts) Derive an expression for the maximum distance H the spring stretches after the blocks are released, in terms of M, g and k . 2
Question 1 - 6 Points In the figure below, block 1 slides from rest along a frictionless ramp from height h and then collides with stationary block 2, sticking to it. After the collision, the blocks now stuck together, slide into a region with a coefficient of kinetic friction μ k , and come to a stop in distance d within that region.

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2007s_f - Physics 2101 Final Exam Spring 2007 Name...

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