The escape velocity from the earth for a rocket is 11.2 km/sec. Ignoring the air resistance, the escape velocity of 10 mg grain of sand from the earth will be
0.112 km/sec
1.12 km/sec
11.2 km/sec
None
A
1.12 km/sec
B
0.112 km/sec
C
11.2 km/sec
D
None
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Solution
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Escape velocity on a planet depends on the mass and radius of the planet alone. Hence, both for the rocket and the sand grain, escape velocity is 11.2 km/sec.
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