Question

A man weighs 60 kg at the earth's surface. At what height above the earth's surface does his weight become 30 kg? (Take radius of earth as R)

Answer 1

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Answer 2

Explanation:

g'=g/2

g/2=g/(1+h/R)²

(1+h/R)²= 2

1+h/R=√2

h/R=√2-1

h/R=1.41-1=0.41

h=0.41R

Ans:(A) 0.41 R