Escape velocity on the surface of earth is 11.2 km/s . Escape velocity from a planet whose mass is the same as that of earth and radius 1/4 that of earth is
(a) 2.8 km/s (b) 15.6 km/s
(c) 22.4 km/s (d) 44.8 km/s
Answer: c
(15)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)