JEE Mains · Physics · STD 11 - 7. gravitation
Earth has mass 8 times and radius 2 times that of a planet. If the escape velocity from the earth is \(11.2 \mathrm{~km} / \mathrm{s}\), the escape velocity in \(\mathrm{km} / \mathrm{s}\) from the planet will be :
- A \(2.8\)
- B \(11.2\)
- C \(5.6\)
- D \(8.4\)
Answer & Solution
Correct Answer
(C) \(5.6\)
Step-by-step Solution
Detailed explanation
\begin{aligned} & \mathrm{V}_{\text {escape }}=\sqrt{\frac{2 \mathrm{GM}}{\mathrm{R}}} \\ & \frac{\left(\mathrm{V}_{\text {escape }}\right)_{\text {Planet }}}{\left(\mathrm{V}_{\text {escape }}\right)_{\text {Earth…
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