6.5.1 Gravitational Potential Energy
It is defined as the work done against the gravitational force to elevate a particle of m to a height h.
If we denote Vg as gravitational P.E.,
Work done=ʃ F dy
mg dy = mg (h2 – h1)
= mg ∆h.
∆vg = mg = ∆h
Vg = mgh
6.5.2 Elastic Potential Energy
If K = spring constant in N I m
x = distance in m
If the deformation is from x1 to x2 then