Question

How potential energy convert into kinatic energy

Answer 1

PE=mgh

PE=40kg×9.8m/s2×3.0m

=1,200J

PE=KE

PE=1/2mv2

12,00J=1/2×(40kv)v2

v=2(1200J)/40

=7.7 m/s

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Answer 2

Answer:

Explanation:

When an object falls, its gravitational potential energy is changed to kinetic energy. You can use this relationship to calculate the speed of the object's descent. Gravitational potential energy for a mass m at height h near the surface of the Earth is mgh more than the potential energy would be at height 0.

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