QUESTION 5 A 1,389- kg roller coaster car moves from point 1 in figure to point 2 and then to point 3. What is the change in gravitational potential energy in going from point 2 to point 3, relative to point 1. (take y = 0 at point 1) h1 = 9 m h2 = 16 m g = 9.8 m/s^2
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