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Potential energy

Two bodies A ...

Question

Two bodies A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.

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Solution

Dear Student

Potential energy above the surface of Earth, u = mgh

Hence, u₁/u₂ = m₁gh₁/m₂gh₂
m and g are equal for both A and B.
so, u₁/u₂ = h₁/h₂ = 20/30 = 2/3

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