Calculate the energy possessed by a stone of mass 20kg kept at a height of 10m.(Given g=10m/s^2)
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Answer:
2 KJ
Explanation:
The formula for potential energy depends on the force acting on the two objects.
P.E. = mgh
where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
Given,
mass of the stone,m = 20 kg
height of the stone,h = 10 m
acceleration due to gravity,g=10m/s^2
Soln:
potential energy of the stone = P.E. = mgh = 20*10*10
potential energy of the stone =2000 J = 2 KJ
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