An object of Mass 40kg is raised to a height of 5m 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.
Medium
Open in App
Updated on : 2022-09-05
Solution
Verified by Toppr
Given :
Mass of the object M=40kg
Height upto which it is raised h=5 m
Potential energy P.E=Mgh
P.E=40×10×5=2000J
Let its kinetic energy be Ek when it is half way down i.e h′=2h
According to conservation of energy,
K.Ei+P.Ei=K.Ef+P.Ef
0+2000=Ek+Mg2h
∴2000=Ek+40×10×25
⟹Ek=1000J
Video Explanation
Solve any question of Work, Energy and Power with:-