Question

If the mass and radius of a planet are doubled, then acceleration due to gravity on its surface will become :

• A. One fourth
• B. One half
• C. Double
• D. Four times

Answer 1

The correct option is B One half

The acceleration due to gravity on the surface is given as

$\frac{Gm}{r^2}$

If the mass and the radius are doubled then the acceleration due to gravity will become

$\frac{G2m}{4r^2}$

Hence the acceleration becomes one half.