A satellite of mass m is placed at a distance r from the centre of earth (mass M). The mechanical energy of the satellite is
(a) -(GMm/r) (b) GMm/r
(c) GMm/2r (d) – ( GMm/2r)
Answer: d
(5)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)