Question

A body of mass 2 kg is dropped from a height of 4 m. What is its kinetic energy, when it the ground ? (g = 10 m/s) ​

Answer 1

Answer:

m=2kg

h=4m

g=10m/s

Here, by conservation of energy, the potential energy of the body at height h is converted into kinetic energy.

Thus,mgh=KE

or KE=2×4×10=80 J

Hope it helps✌️

Answer 2

Answer:

Here, by conservation of energy, the potential energy of the body at height h is converted into kinetic energy before its strikes the ground.

Thus, mgh=KE

or KE=0.1(10)10=10J

Explanation:

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