A double star consists of two stars having masses m and 2m. The distance between their centers is equal to r. They revolve under their mutual gravitational attraction. Which is/are correct?
a) The force experienced by the star of mass m is Gm(2m) /r²
b) The force experienced by the star of mass 2m is Gm(2m) /r²
c) The force experienced by the star of mass m is Gm²/r²
d) The force experienced by the star of mass 2m is 2Gm²/r²
