Question 442: Gravitation

Question

A body of weight 72 N moves from the surface of earth at a height half of the radius of earth, then gravitational force exerted on it will be

Accepted Answer

$${F_{surface}} = G{{Mm} \over {R_e^2}}$$
$${F_{{R_e}/2}} = G{{Mm} \over {{{\left( {{R_e} + {R_e}/2} ight)}^2}}} = {4 \over 9} 	imes {F_{surface}}$$
$$ = {4 \over 9} 	imes 72 = 32\,N$$

Answer

36 N

Answer

32 N

Answer

144 N

Answer

50 N

Gravitation

A body of weight 72 N moves from the surface of earth at a height half of the radius of earth, then gravitational force exerted on it will be

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