Q. If $g$ is the acceleration due to gravity at the earth’s surface and $r$ is the radius of the earth, the escape velocity for the body to escape out of earth’s gravitational field is
A) $gr$
B) $\sqrt{2\ gr}$
C) $g/r$
D) $r/g$
Explanation
The correct answer is Option B: $\sqrt{2\ gr}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.