Problem # p029

Motion of Center of Mass of 2 Particles

The two packages of mass mA= 2 kg and mB = 4 kg are sliding down the shown incline under influence of gravity. The coefficient of kinematic friction between each package and the incline is = 0.25 and = 0.3, respectively.

Determine the acceleration of the two packages and the normal force between them if the angle between the incline and the horizontal is = 30o.
There is No friction between the two packages.