Questions
The escape velocity of a projectile on the earth's surface is 11.2 km s-1. A body is projected out with thrice this speed. The speed of the body far away from the earth will be :
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a
22.4 km s-1
b
31.7 km s-1
c
33.6 km s-1
d
none of these
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Correct option is C
−GMmR+12m3ve2=0+12mv∞2⇒v∞=33.6km/sSimilar Questions
When a projectile attains the escape velocity, then on surface of planet its
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