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Question: A man weighs W on the surface of the earth. What is his weight at a height equal to R ? (R ® Radius ...

A man weighs W on the surface of the earth. What is his weight at a height equal to R ? (R ® Radius of earth)

A

W

B

W/2

C

W/4

D

W/8

Answer

W/4

Explanation

Solution

= ghg\frac { \mathrm { g } _ { \mathrm { h } } } { \mathrm { g } } = R2(R+R)2\frac { \mathrm { R } ^ { 2 } } { ( \mathrm { R } + \mathrm { R } ) ^ { 2 } } = Wh = W4\frac { \mathrm { W } } { 4 }