Q.

If g is acceleration due to gravity on the surface of the earth, having radius R, the height at which the acceleration due to gravity reduces to g/2 is

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a

R/2

b

2R

c

R2

d

(2−1)R

answer is D.

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Detailed Solution

ghg=R2(R+h)2 Given gh=g2
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If g is acceleration due to gravity on the surface of the earth, having radius R, the height at which the acceleration due to gravity reduces to g/2 is