Question:
The escape velocity from the surface of Earth is 11.2 km/s. If the radius of Earth is doubled and mass remains the same, the new escape velocity will be:
The escape velocity from the surface of Earth is 11.2 km/s. If the radius of Earth is doubled and mass remains the same, the new escape velocity will be:
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Escape velocity varies inversely with square root of radius.
Updated On: Jan 5, 2026
- 11.2 km/s
- 7.92 km/s
- 15.84 km/s
- 22.4 km/s
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
\[
v_e \propto \frac{1}{\sqrt{R}}
\]
\[
v'=\frac{11.2}{\sqrt{2}}=7.92\ \text{km/s}
\]
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