Assertion (A): The mechanical energy of earth-moon system remains same when another heavenly body passes nearby the earth-moon system.
Reason (R): Force exerted by heavenly body on the earth-moon system is non-conservative.
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false
Solution:
Assertion (A) is false. If another heavenly body passes nearby, it exerts an external gravitational force on the earth-moon system. This external force can do work, changing the system's total mechanical energy. Reason (R) is false. Gravitational force is a conservative force, not non-conservative. Therefore, both (A) and (R) are false.
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