Seudónimo Seudónimo
  • 01-11-2015
  • Physics
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Find the energy in joules required to lift a 55.0 megagram object a distance of 500cm

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AL2006
AL2006 AL2006
  • 01-11-2015

1,000 grams = 1 kilogram
so 55 megagrams = 55,000 kilograms

100 cm = 1 meter
so 500 cm = 5 meters

Acceleration of gravity on Earth = 9.8 m/s²

Weight = (mass) x (gravity)

========================================

Work = increase in potential energy =

               (weight) x (height) =

             (mass) x (gravity) x (height) =

             (55,000 kg) x (9.8 m/s²) x (5 m) =

                     2,695,000 joules .

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