Physics

Problem

Which of the following expressions gives the acceleration due to gravity

g_h

at a height

h

above the Earth’s surface, where

g

is its surface value and

R

is Earth’s radius? a)

g\left(1-\dfrac{h}{R}\right)

g\left(\dfrac{R+h}{R}\right)^{2}

g\left(\dfrac{R}{R+h}\right)^{2}

g\left(\dfrac{R}{R+h}\right)