The gravitational potential energy of a body of mass ‘m’ at the earth’s surface -mgRe . Its gravitational potential energy at a height Re from the earth’s surface will be (Here is Re the radius of the earth)
(a) -2 mgR e (b) 2 mgR e
(c) 1/2 mgR e (d) -(1/2) mgR e
Answer: d
(5)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)