v e and vp denotes the escape velocity from the earth and another planet having twice the radius and the same mean density as the earth. Then
(a) ve = vp (b) ve = vp /2
(c) ve = 2vp (d) ve = vp /4
Answer: b
(5)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)