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HELP ME NOW PLEASE !!! A stone of 4.5 kg mass is falling from the top of a 60 m high multi storey building.Find the kinetic energy of the stone when it reaches the ground.

HELP ME NOW PLEASE !!! A stone of 4.5 kg mass is falling from the top of a 60 m high multi storey building.Find the kinetic energy of the stone when it reaches the ground.
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21 votes
HELP ME NOW PLEASE !!!

A stone of 4.5 kg mass is falling from the top of a 60 m high multi storey building.Find the kinetic energy of the stone when it reaches the ground.

asked
User Kosuke Ogawa
by
9.1k points

1 Answer

2 votes

The kinetic energy will be equal to the potential energy at top

  • PE=mgh

m is mass

h is height

  • PE=4.5(60)(9.8)
  • PE=2646J
answered
User Michael Blood
by
8.6k points
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