73. Weight of a body of mass m decreases by 1% when it is raised to height h above the earth’s surface. If the body is taken to a depth h in a mine, change in its weight is
(a) 2% decrease (b) 0.5% decrease
(c) 1% increase (d) 0.5% increase
Answer: b
(9)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)