PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
Callisto and Europa are both moons of Jupiter. Here are some data about the two moons and their circular orbits:
- Europa's average speed in orbit is 1.7 times that of Callisto's average speed in orbit.
- Europa's mass is 0.43 times that of Callisto's mass.
- Europa's orbital radius is 0.35 times that of Callisto's orbital radius.
Which of the following is the best estimate of the ratio of the centripetal force acting on Europa to the centripetal force acting on Callisto?
(1) 0.28
(2) 1.0
(3) 2.1
(4) 3.6