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Question
Assertion :If infinity is taken as reference, the gravitational potential is negative everywhere on the surface of earth. Reason: Every body on its surface is bound to gravitational attraction of earth.
Assertion :If infinity is taken as reference, the gravitational potential is negative everywhere on the surface of earth. Reason: Every body on its surface is bound to gravitational attraction of earth.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
A positive work must be done against gravity to move the object away from the earth, the object would gain potential energy it moved away from the earth but it has zero potential energy at infinity. Hence it must have negative potential energy when closer to earth. So, both assertion and reason are correct and reason is the correct explanation.
A positive work must be done against gravity to move the object away from the earth, the object would gain potential energy it moved away from the earth but it has zero potential energy at infinity. Hence it must have negative potential energy when closer to earth. So, both assertion and reason are correct and reason is the correct explanation.
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