Q. At some point the gravitational potential and also the gravitational field due to earth is zero. The speed is
A) On earth’s surface
B) Below earth’s surface
C) At a height $R_{e}$ from earth’s surface ($R_{e} =$ radius of the earth)
D) At infinity
Explanation
(d) $V = \frac{- GM}{r}$ and $I = \frac{GM}{r^{2}}$
$V = 0$ and $I = 0$ at $r = \infty$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.