two blocks (a and b) are in contact on a horizontal frictionless surface. a 60N constant horizontal force is applied to A. the mass of a is 3.0 kg and the mass of b is 15 kg. what is the magnitude of the force of a on b

Answer 1

the blocks accelerate at
... 60/18 = 10/3 m/s^2

the force necessary for b
... 15 * 10/3