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11 July, 08:56

A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller

coaster? (Formula: PE = mgh)

800 kg

7.840 kg

8,000 kg

78,400 kg

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Answers (2)
  1. 11 July, 09:23
    0
    The answer is 800 kg due to the fact the formula for PE = mgh so when we substitute we get 235,200=m (9.8) (30) than you need to divide 235,200/9.8 (30) = m to get m.
  2. 11 July, 09:35
    0
    Answer: if would be 799.88 but i guess the closest other one would be the last one
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