Problem 7.79 Review | Constants Determine the speed of the block with mass m = 1.60 kg after the collision. Express your answer to three significant figures and include the appropriate units. A block of mass m = 1.60 kg starts from the rest and slides down a 30.0 incline which is 3.60 m high. At the bottom, it strikes a block of mass M = 7.80 kg which is at rest on a horizontal surface (Figure 1). (Assume a A ? smooth transition at the bottom of the incline.) The Um= Value Units Figure