Question

The acceleration of a body due to the attraction of the earth (radius R) at a distance 2R from the surface of the earth is (g = acceleration due to gravity at the surface of the earth)

• A. $\frac{g}{9}$
• B. $\frac{g}{3}$
• C. $\frac{g}{4}$
• D. $g$

Answer 1

The correct option is A

$\frac{g}{9}$

$\frac{g^{\prime }}{g}={\left(\frac{R}{R+h}\right)}^2={\left(\frac{R}{R+2R}\right)}^2=\frac{1}{9}\therefore g^{\prime }=\frac{g}{9}.$