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25 April, 04:03

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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Answers (1)
  1. 25 April, 04:20
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    Gravitational potential energy is calculated by multiplying mass, height and the acceleration due to gravity.

    Gravitational potential energy = mgh

    Gravitational potential energy = 75 kg (9.8 m/s^2) (30 m)

    Gravitational potential energy = 22050 joules

    Therefore, the correct answer is option D.
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