The velocity with which a projectile must be fired so that it escapes earth’s gravitation does not depend on
a) Mass of the earth
(b) Mass of the projectile
(c) Radius of the projectile’s orbit
(d) Gravitational constant
Answer: b
(6)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)