Calculate the potential energy stored in a metal ball of mass 80 kg kept at the height of 15meter from the earths surface.what will be its potential energy when it was kept on the earth surface?(take gram =9.8m/s2)
Answers
Answer:
When ball is at rest it will only have Potential Energy that is,
P.E=mgh
m= 2 kg;h=5 m
P.E=2×10×5=100J
This is the total energy as K.E is zero when the ball is at maximum height that is when it is at 5 m. Hence when the ball reaches the ground P.E becomes zero because of zero height.At this point,the total energy is equal to the K.E that is K.E=100J.
Explanation:
Answer
The potential energy stored in the metal ball at a height of 15 mtrs= 11760 Watts
The potential energy stored in the metal ball on ground = 0 Watt
Explanation:
we know,
potential energy= (mass of body)* (acceleration due to gravity)*(the height of the body)
hence when the body is at a height of 15mtrs
potential enery= 80kg * 15 mtrs * 9.8 m/s^2
= 11760 Watts
when the body is on ground
height of the body= 0 mtrs
hence potential energy = 80kg * 0 mtrs * 9.8 m/s^2 =0 watt