# MT2 - Phys 211 MT02 Sample Exam 1 A horizontal spring(not...

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Phys 211 MT02 Sample Exam 1. A horizontal spring (not pictured) with a spring constant of 588 N/m is used to launch a 2.00 kg block. The block slides a long a frictionless plateau and then down a frictionless ramp with total change in height of h = 0.750 m . It then slides over a flat, rough region where the coefficient of kinetic friction μ k is 0.300. If the block is to slide a hault a distance D = 3.00 m into the rough section, how far should the spring have been compressed to launch the block? (Assume that the block and spring were released from rest.) A. 0.100 m B. 0.00500 m C. 0.245 m D. 0.332 m E. 0.0100 m 2. A large block of cheese, attached securely to a bungee cord, is released from rest from a stationary helicopter. The helicopter is 50 meters above the ground. The bungee cord has an unstretched length of 20 meters and a spring constant of 50 Newtons per meter. The mass of the cheese is 100 kg. Unfortunately the helicopter is too low and the cheese hits the ground. With approximately what velocity does it hit the ground? A. 0 m/s B. 24 m/s C. 16 m/s D. 32 m/s E. 50 m/s Page 1

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Phys 211 MT02 Sample Exam 3. A slider of mass 10 M is moving to the right with a velocity of 10 m/s on an air track. Another slider of mass M is moving to the left at 50 m/s. The two sliders collide and stick together making one slider of mass 11M. What is the approximate velocity of this resultant block (moving right is the + direction)? A. -4.5 m/s B. 50 m/s C. -50 m/s D. 0 m/s E. 4.5 m/s 4. A 9 kg mass moves along the x -axis. Its acceleration as a function of its position is shown in the figure below. What is the net work performed on the mass by the force causing the acceleration as the mass moves from x = 0 to x = 8.0 m? A. 720 J B.
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MT2 - Phys 211 MT02 Sample Exam 1 A horizontal spring(not...

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