Problem 7. A block (m1 = 10 kg) is initially at rest on the floor. (a) What force does the floor exert on the block? (b) Then, a rope is

tied to the block and is run vertically over a pulley. The other end of the rope is attached to a freely hanging block (m2 = 5 kg). See figure below. What is the force exerted by the floor on m1 ow? (c) We now change m, to 15 kg. What is the force exerted by the floor on m1 now?