Question

Calculate the force of gravitation between the earth and the sun, given that the mass of the earth $=6\times {10}^{24}kg$ and of the Sun $=2\times {10}^{30}kg$. The average distance between the two is $1.5\times {10}^{11}m$

Answer 1

We know that,

Force of gravitation $F=\frac{GMm}{r^2}$

$=\frac{6.67\times {10}^{-11}\times 6\times {10}^{24}\times 2\times {10}^{30}}{(1.5\times {10}^{11}{)}^2}$

$=35.57\times {10}^{21}N$

$=3.557\times {10}^{22}N$