First slide

Gravitaional potential energy

Question

An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy E₀ . Its potential energy is

Easy

A

-E₀
B

1.5 E₀
C

2 E₀
D

E₀

Solution

Potential energy = 2 × (Total energy) = 2E₀
Because we know = $U = \frac{- GMm}{r}$ and $E_{0} = \frac{- GMm}{2 r}$ .

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