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4. In the figure we see two blocks connected by a string and tied to a wall, with 0 = 34.0. The mass of the lower block is m = 1.35 kg; the mass of the upper block is 3.50 kg. Find the tension in the string that is tied to the wall. N 5. A child slides down a slide with a 290 incline, and at the bottom her speed is precisely one-third what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child. 6. A mass m1 = 4.80 kg block on a tabletop is attached by a string to a hanging block of mass my = 2.40 kg, as shown in the figure. The coefficient of kinetic friction between the mass (m1) and the surface is 0.19. The blocks are released from rest and allowed to move freely. Find the magnitude of the tension in the string. N