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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 halfway 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 halfway down.

Grade:12th pass

1 Answers

Harshit Singh
askIITians Faculty 5963 Points
2 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 = 1000 J
And P. E. = K. E.
Kinetic Energy = 1000 J

Thanks

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