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An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy. If the object is allowed to fall, find its kinetic energy when it is half-way down.

 An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy. If the object is allowed to fall, find its kinetic energy when it is half-way down.

Grade:12

1 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student


Mass = 40 kg
h = 5m
P.E. _ ?[ g = 10 m/ s2]
P.E. = mgh
= 40 × 10 × 5
P.E. = 2000J
When the object falls the potential energy gets transformed into kinetic energy. When the object is half way down
P.E.= will become half
i.e.= 2000
2
= 1000J and P.E.=K.E.
Kinetic Energy = 1000J

Thanks

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