Q. What is the binding energy of earth-sun system neglecting the effect of other planets and satellites? (Mass of earth $M_{e} = 6 \times 10^{24}$kg, mass of the sun $M_{x} = 2 \times 10^{30}kg^{- 2}$)
A) $8.8 \times 10^{10}\ J$
B) $8.8 \times 10^{3}\ J$
C) $5.2 \times 10^{33}\ J$
D) $2.6 \times 10^{33}\ J$
Explanation
(d) Binding energy of the system $= \frac{GM_{e}M_{s}}{2r}$
$= \frac{6.6 \times 10^{- 11} \times 6 \times 10^{24} \times 2 \times 10^{30}}{2 \times 1.5 \times 10^{11}}$
$= 2.6 \times 10^{33}J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.