If mass of earth is M, radius is R and gravitational constant is G, then work done to take 1 kg mass from earth surface to infinity will be
(a) √GM/2R (b) GM/R
(c) 2√GM/R (d) GM/2R
Answer: b
(5)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)