The acceleration due to gravity is g at a point distant r from the centre of earth of radius R. If r < R , then
(a) g ∝ r (b) g ∝ r2
(c) g ∝ r-1 (d) g ∝ r-2
Answer: a
(11)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)