A body of mass m is situated on the earth in the gravitational field of sun. For the body to escape from the gravitational pull of the solar system the body must be imparted an escape velocity of (assume earth to be stationary).

42 kms^{– 1}

v = $\sqrt{\frac{2 GM_{s}}{R_{se}}}$

$\Rightarrow v=\sqrt{\frac{2\left(6.67 \times 10^{-11}\right)\left(2 \times 10^{30}\right)}{1.5 \times 10^{11}}}$

⇒ v = 42.174 kms^{– 1}