Q. If the earth suddenly shrinks (without changing mass) to half of its present radius, the acceleration due to gravity will be
A) $g/2$
B) $4g$
C) $g/4$
D) $2g$
Explanation
(b) $g = \frac{GM}{R^{2}}$. If radius shrinks to half of its present value then $g$ will becomes four times
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.