A body of mass m = 5 kg slides along the surface of a triangular prism of mass M = 35 kg, the upper plane of which is inclined to the horizon at an angle a = 30°. The prism lies on a horizontal plane that has a vertical ledge at the rear wall of the prism, which holds the prism at rest. Find the force of pressure of the prism on the ledge of the plane when the body moves along the surface of the prism. What is the pressure of the prism on the base of the plane? Ignore friction.

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