p201f02-exam02

# p201f02-exam02 - Seat Physics P201 D Baxter/R Heinz EXAM#2...

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1. Preston pushes a wheelbarrow weighing 500 N to the top of a 50.0 m long ramp, inclined at 20.0° with the horizontal, and leaves it. Tamara accidentally bumps the wheelbarrow. It slides back down the ramp, during which a frictional force of magnitude 80.0 N acts on it over the 50.0 m. What is the wheelbarrow’s kinetic energy at the bottom of the ramp? a. 4,550 J b. 6,550 J c. 8,150 J d. 10,150 J e. 12,150 J 2. An amount of work equal to 1.5 J is required to compress the spring in a horizontal spring-gun. What is the “launch speed” of a 15 g marble launched by this gun? a. 26 m/s 22 m/s c. 18 m/s d. 14 m/s e. 10 m/s 50 m 20 o
3. A 525 kg mass is released from rest on the right side of a track at a height 3.5 m above a horizontal surface at the foot of the slope. It collides elastically with a 525 kg mass which is initially at rest on the horizontal surface, as shown in the figure.

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## This note was uploaded on 07/02/2011 for the course PHYS 201 taught by Professor Woodahl during the Fall '09 term at Indiana.

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p201f02-exam02 - Seat Physics P201 D Baxter/R Heinz EXAM#2...

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