What is the escape speed from the surface of a planet of radius that has an…

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

Problem

What is the escape speed from the surface of a planet of radius

r

that has an acceleration of gravity

g

at its surface? (A)

\sqrt{\frac{g}{r}}

(B)

\sqrt{gr}

(C)

\sqrt{\frac{2g}{r}}

(D)

\sqrt{2gr}