Question
In which of the following cases does the gravitational force act as the centripetal force?
Answer: Option B
:
B and D
Centripetal force is the force that comes into picture when a body is moving in a circular path. It acts towards the centre of the circular path, thus changing the direction of motion at every instant.
In case of moon's revolution, the gravitational force of earth on the moon causes the moon to revolve around the earth. In case of earth's revolution, the gravitational force of the sun on the earth causes the earth to revolve around the sun. Hence, the gravitational force acts as the centripetal force in these two cases.
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:
B and D
Centripetal force is the force that comes into picture when a body is moving in a circular path. It acts towards the centre of the circular path, thus changing the direction of motion at every instant.
In case of moon's revolution, the gravitational force of earth on the moon causes the moon to revolve around the earth. In case of earth's revolution, the gravitational force of the sun on the earth causes the earth to revolve around the sun. Hence, the gravitational force acts as the centripetal force in these two cases.
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