The escape speed from the surface of earth is

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

Problem

v_{esc}

. The radius of earth is

R

. A satellite of mass

m

is in orbit at a height

\frac{R}{4}

above the surface of the Earth. What is the energy required to move the satellite to infinity? (A)

\frac{mv_{esc}^2}{5}

(B)

\frac{2mv_{esc}^2}{5}

(C)

mv_{esc}^2

(D)

2mv_{esc}^2