NEET 2024 Physics Acceleration due to Gravity MCQ Question with Solution

The mass of a planet is ¹⁄₁₀th that of the earth and its diameter is half that of the earth. The acceleration due to gravity on that planet is:

A

4.9 m s⁻²

B

3.92 m s⁻²

C

19.6 m s⁻²

D

9.8 m s⁻²

Correct Answer

Option B

Detailed Explanation

The acceleration due to gravity is given by $g = \frac{GM}{R^2}$ . Since the mass is $\frac{1}{10}$ and radius is $\frac{1}{2}$ , the acceleration is $\frac{1}{10} \times \frac{4}{1} = \frac{2}{5}$ of earth's gravity, which is 4.9 m s⁻².

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