Rahul sits in a chair reading a book. Which force is equal to the force Rahul exerts on Earth?

By Newton’s third law, the force Rahul exerts on Earth is equal in magnitude and opposite in direction to the force Earth exerts on Rahul. Earth’s force on Rahul is his weight, so the matching choice is Rahul’s weight. The book and chair are not part of the force pair between Rahul and Earth.

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