The acceleration due to gravity at the Earth's surface depends on

  1. A. its mass only.
  2. B. its radius only.
  3. C. both its mass and radius.
  4. D. either its mass or its radius.

Correct Answer: C. both its mass and radius.

Explanation

The acceleration due to gravity on the surface of the Earth is given by the formula g = \frac{GM}{R^2}, meaning it depends on both the Earth's mass (M) and its radius (R).

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