The surface between a 12kg block , the 16kg wedge and between 16 kg wedge and the horizontal plane are smoothe ( without friction). The acceleration of gravity is 9.8 m/s, A block is released on the inclined plane(top side of the wedge).
What is the force F which must be exerted on the 16 kg block in order that the 12 kg block does not move up or down the plane?