Practice question
Question
What is the primary source of centripetal force for an Earth satellite?
Explanation
For a satellite in circular orbit, the centripetal force (F = mv2r) is provided by Earth’s gravitational force (F = GMEmr2), which keeps it in orbit. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Gravitational force. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
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