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Gravitation

Question

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A particle of mass 10 g is kept on the surface of a uniform sphere of mass 100 kg and radius 10 cm. Find the work to be done against the gravitational force between
(you may take G = 6 . 67× 10^-11 Nm²/ kg²)

13.34 x 10^-10 J

3.33 x 10^-10 J

6.67 x10^-9 J

6.67 x10^-10 J

Solution

D.

6.67 x10^-10 J

increment straight W space equals space straight v subscript straight f minus straight v subscript straight i space equals space 0 minus open square brackets fraction numerator negative GMm over denominator straight R end fraction close square brackets straight w space equals space fraction numerator space 6.67 space straight x space 10 to the power of negative 11 end exponent space space straight x 1000 over denominator.1 end fraction space straight x 10 over 1000 space equals space 6.67 space straight x space 10 to the power of negative 10 space end exponent straight J

Some More Questions From Gravitation Chapter

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