Physics - Gravitation Question with Solution | TestHub
Given below are two statements:
Statement-1: An object placed at the equator of a rotating earth experiences a slightly smaller effective gravitational acceleration than if it were placed at the poles.
Statement-2: A satellite orbiting the Earth experiences weightlessness because the gravitational force on it is zero.
Options:
Answer:
Solution:
Statement-1: Due to the Earth's rotation, a centrifugal force acts outwards, reducing the effective gravitational acceleration. This effect is maximum at the equator and zero at the poles. Hence, , while . So, effective gravitational acceleration is smaller at the equator. Thus, Statement-1 is true.
Statement-2: A satellite in orbit is continuously falling towards the Earth under the influence of gravity. Weightlessness is experienced because both the satellite and objects inside it are in a state of free fall, not because the gravitational force is zero. The gravitational force is significant, providing the necessary centripetal force for orbit. Thus, Statement-2 is false.
