Question: The escape velocity of a body on the earth surface is $11.2 \mathrm{~km} / \mathrm{s}$. If the same body is projected upward with velocity $22.4 \mathrm{~km} / \mathrm{s}$, the velocity of this body at infinite distance from the centre of the earth will be:
A) $11.2 \sqrt{2} \mathrm{~km} / \mathrm{s}$
B) Zero
C) $11.2 \mathrm{~km} / \mathrm{s}$
D) $11.2 \sqrt{3} \mathrm{~km} / \mathrm{s}$
