Physics
Grade-7
Easy

Question

A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. What is the gravitational potential energy of the carriage?

  1. 2.46KJ
  2. 252KJ
  3. 2.46J
  4. 252J

The correct answer is: 252J


    h = 21m
    m = fraction numerator 12 over denominator 9.8 end fraction space K g
    GPE = mgh
    fraction numerator 12 over denominator 9.8 end fraction cross times 9.8 cross times 21
    = 252J

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