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(II) A train locomotive is pulling two cars of the same mass behind it, Fig. 4-39. Determine the ratio of the tension in the coupling (think of it as a cord) between the locomotive and the first car (FT1), to that between the first car and the second car (FT2), for any nonzero acceleration of the train.
FIGURE 4-39 Problem 36.
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- 12. The box of donuts in Fig. 5-32 has a weight component of 5 N along the frictionless ramp. The force on the box from the cord has magnitude T. When the box is (a) stationary, (b) moving up the ramp at constant speed, (c) moving down the ramp at constant speed, (d) moving up the ramp at decreasing speed, and (e) moving down the ramp at decreasing speed, is T equal to, greater than, or less than 5 N? FRESH DONUTSarrow_forward(II) The two forces F, and F, shown in Fig. 4-52a and b (looking down) act on an 18.5-kg object on a frictionless tabletop. If F = 10.2 N and F, = 16.0 N, find the net force on the object and its acceleration for (a) and (b). y y F2 120° F 90° F (a) (b) FIGURE 4–52 Problem 28.arrow_forward(I) If the coefficient of kinetic friction between a 22-kg crate and the floor is 0.30, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if Mk is zero?arrow_forward
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