The escape speed from a planet of radius is

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

Problem

The escape speed from a planet of radius

R

v_{\text{esc}}

. A satellite orbits the planet at a distance

R

from the surface of the planet. What is the orbital speed of the satellite? (A)

\frac{1}{2}v_{\text{esc}}

(B)

\frac{\sqrt{2}}{2}v_{\text{esc}}