A rollercoaster starts at a height of 30m above the ground. At the bottom of a loop. The rollercoaster is at a height of 10m. Approximately, how much gravitational potential energy is lost by a 75kg rider?
A. 19.6 joules. Eliminate.
B. 1470 joules.
C. 14,700 joules
D. 22,050 joules
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