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Course: AP®︎/College Physics 1 > Unit 4

Lesson 1: Work and mechanical energy
Science
AP®︎/College Physics 1
Energy and momentum
Work and mechanical energy
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Work and mechanical energy

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Problem

A 1,550kg roller coaster cart is pulled at a constant speed of 2.3m/s to the top of a 53.5m tall ramp that has a 30∘ incline. The coefficient of friction between the ramp and the roller coaster cart is μ=0.075.
Calculate the work done by friction on the roller coaster cart during its motion up the ramp.
Write your answer to three significant figures.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
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