Which of the following expressions gives the acceleration due to gravity at an…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Which of the following expressions gives the acceleration due to gravity

g_h

at an altitude

h

above Earth’s surface (Earth’s radius

R

)? (a)

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

(b)

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

(c)

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

(d)

g_h = g\left(\dfrac{R-h}{R}\right)^2