Q. The mass and radius of the sun are $1.99 \times 10^{30}kg$ and $R = 6.96 \times 10^{8}\ m$. The escape velocity of a rocket from the Sun is
A) $11.2\ km/s$
B) $2.38\ km/s$
C) $59/5\ km/s$
D) $618\ km/s$
Explanation
(d) $v_{e} = \sqrt{\frac{2GM}{R}}$
$= \sqrt{\frac{2 \times 6.67 \times 10^{- 11} \times 1.99 \times 10^{30}}{6.96 \times 10^{8}}}$
$= 618\ km/sec$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.