If V, R and g denote respectively the escape velocity from the surface of the earth radius of the earth, and acceleration due to gravity, then the correct equation is
(a) V=√gR (b) V=√ 4/3 gR 3
(c) V = R√g (d) V =√2 gR
Answer: d
(7)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)