A 1,457- 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 = 22 m
g = 9.8 m/s2