# Quiz 4 - Quiz 4 1 A car of mass 1420 kg traveling at 26 m/s...

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Quiz 4 1 . A car of mass 1420 kg traveling at 26 m/s is at the foot of a hill that rises 100 m in 3.6 km. At the top of the hill, the speed of the car is 10 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses. __________ Watts 2 . A roller coaster, shown below ( h 1 = 30.0 m, h 2 = 18.0 m, h 3 = 25.0 m), is pulled up to point A where it and its screaming occupants are released from rest. Assuming no friction, calculate the speed at point C . __________ m/s 3 . During a workout, the football players at Rutgers State University ran up the stadium stairs at a steady pace in 42 s. The stairs are 100 m long and inclined at an angle of 27 o . If a typical player has a mass of 92 kg, estimate the average power output on the way up. Ignore friction and air resistance.(g = 9.8 m/s 2 ) __________ watts 4 . The 2 kg block in the figure slides down a frictionless curved ramp, starting from rest at a height of h = 1 m. The block then slides d = 12 m on a rough horizontal surface before coming to rest.What is the coefficient of friction between the block and the horizontal surface? __________

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