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JEE PHYSICS MCQ: GRAVITATION

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Assertion: The work done to project a body of mass

m

from the earth's surface (radius

R

) to infinity is

m g R

.

Reason: The required work done is equal to change in potential energy of the mass, which is equal to

G M m / R

.

View answer and explanation

Correct option: A

If both assertion and reason are true and reason is the correct explanation of the assertion.

Option A is correct because the work done to project a body to infinity is equal to the change in potential energy, which is mgR.

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