practice

practice - P201 Fall 2005 Practice Midterm 2 1 A small...

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P201 Fall 2005: Practice Midterm 2 1. A small metal cylinder rests on a circular turntable, rotating at a constant speed as illustrated in the figure above. Which of the sets of vectors a-e below best describes the velocity, acceleration, and net force acting on the cylinder at the point indicated in the diagram? (Assume that gravity is pointing into the page and does not directly contribute to forces in the plane of the turntable). a. b. c. d. e.

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2. At the bowling alley, the ball-feeder mechanism must exert a force to push the bowling balls up a 1.0 m long ramp, as in the figure below. The ramp leads the balls to a chute 0.5 m above the base of the ramp. Approximately how much force must be exerted on a 5.0 kg bowling ball? a. 200 N b. 50 N c. 25 N d. 5.0 N e. impossible to determine 3. If the stretch of a spring is made three times longer, the force it exerts is also increased by a factor of 3. By what factor does the potential energy increase?
4. Topic not covered in Fall 2005 Midterm 2 The figure below depicts the paths of two colliding steel balls, A and B. Which set of arrows best represents the direction of the change in momentum of each ball?

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