Two satellites, P and Q

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

Problem

Two satellites, P and Q, move in separate circular orbits of equal radius around Earth. Satellite P completes one revolution in

1\,\text{h}

, while satellite Q takes

2\,\text{h}

. Which statement is correct about their speeds? (a) Both satellites have the same speed (b)

Q

moves twice as fast as

P

(c)

P

moves twice as fast as

Q

(d) The speeds cannot be compared without knowing their masses