3. A small block of mass m rests on the rough, sloping side of a triangular block of mass M which itself rests on a horizontal frictionless table as shown in the figure. If the coefficient of static friction is us, determine the minimum horizontal force F M applied to M that will cause the small block m to start moving up the incline. If the coefficient of kinetic friction is #k, determine its acceleration under the action of the force found once it starts to move up the incline