JEE Main Physics question
The mass of the earth is kg. The constant of gravitation . The potential energy of the earth–moon system is J (moon's mass kg). The mean distance between earth and moon is
Answer: (A)
Solution
\dfrac{GMm}{r}\dfrac{GMm}{|U|}\dfrac{6.67×10^{-11}×6.00×10^{24}×7.35×10^{22}}{7.73×10^{28}}$\
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