Which one of the following correctly expresses the relationship between the escape…

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

Problem

Which one of the following correctly expresses the relationship between the escape speed

v_{esc}

and the circular orbital speed

v_{orb}

of a satellite at the same distance from the centre of a planet? (a)

v_{esc}=v_{orb}

(b)

v_{esc}=2\,v_{orb}

(c)

v_{esc}=\sqrt{2}\,v_{orb}

(d)

v_{esc}=\dfrac{v_{orb}}{\sqrt{2}}