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CBSE Class 9 Answered

what is potential energy explain with diagram
 
Asked by taranarora200 | 07 Feb, 2015, 10:32: PM
answered-by-expert Expert Answer
The potential energy of a body is due to its higher position above the earth and it is equal to the work done on the body, against gravity in moving the body to that position. 
So, to find the potential energy of a body lying at a certain height, we have to find the work done in taking the body to that height.
 
Suppose a body of mass 'm' is raised to a height 'h' above the surface of the earth.
The force acting on the body is the gravitational pull of the earth mxg which acts in the downward direction. To lift the body above the surface of the earth, work has to be done against this force of gravity.
Work done = Force x Distance
W = mxgxh
This work done gets stored up in the body as potential energy.
Therefore, Potential Energy (P.E.) = m x g x h
where, m=mass of the body
          g=acceleration due to gravity
          h=height of the body
 
Answered by Faiza Lambe | 09 Feb, 2015, 11:02: AM

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