In the figure below, a frictionless roller coaster of mass m = 553 kg tops the f
ID: 1903783 • Letter: I
Question
In the figure below, a frictionless roller coaster of mass m = 553 kg tops the first hill with speed v0 = 7.5 m/s at height h = 33 m.
(a) How much work does its weight do on it from the initial point to point A?
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(b) How much work does its weight do on it from the initial point to point B?
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(c) How much work does its weight do on it from the initial point to point C?
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(d) The gravitational potential energy of the coaster-Earth system is taken to be zero at point C. What is its value when the coaster is at point B?
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(e) What is its value when the coaster is at point A?
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(f) If mass m were doubled, would the change in the gravitational potential energy of the system between points A and B increase, decrease, or remain same?
Explanation / Answer
a. zero. b. mgh/2 c. mgh d. mgh/2 e. mgh f.remains same.