Question 15 (5 points) A store clerk pulls three carts connected with two horizontal cords to move products from the storage room to the display shelves. The masses of the loaded carts are: m1 = 15.0 kg; m2 = 13.0 kg; and m3 = 16.0 kg. Friction is negligible. Athird cord, which pulls on cart 1 and is at an angle of 20.0\" above the horizontal, has a tension of magnitude 35.5 N. Determine the magnitude of a) the acceleration of the carts b) the tension in the last cord c) the tension in the middle cord Question 16 (5 points) Two students need to pull on heavy sleigh to pull it out of a rough patch of snow. One child exerts a maximum force of 40.0 N and another 58.0 N, on ropes, to just get the sleigh to move. The angles the horizontal ropes make with the direction of travel are 30 and 20, respectively. If the sleigh's mass is 75 kg, and the sleigh moves in a straight line, what is the coefficient of static friction between the sleigh and the snow? 40 N 30 direction of travel sleigh 20 58 N top view