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Question: Answered & Verified by Expert
A small asteroid is orbiting around the sun in a circular orbit of radius $\mathrm{r}_{0}$ with speed $\mathrm{V}_{0}$. A rocket is launched from the asteroid with speed $\mathrm{V}=\alpha \mathrm{V}_{0}$, where $\mathrm{V}$ is the speed relative to the sun. The highest value of $\alpha$ for which the rocket will remain bound to the solar system is (ignoring gravity due to the asteroid and effects of other planets) -
PhysicsGravitationKVPYKVPY 2012 (SB/SX)
Options:
  • A $\sqrt{2}$
  • B 2
  • C $\sqrt{3}$
  • D 1
Solution:
1337 Upvotes Verified Answer
The correct answer is: 1
$\begin{array}{l}
\text { B.E }=\frac{G m M}{2 R} \\
\text { B.E }=\frac{1}{2} m v_{0}^{2} \\
\text { so, } \alpha=1
\end{array}$

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