Two ropes are attached to a 40-kg object. The first rope applies a force of 25 N and the second, 40 N. If the two ropes are perpendicular to each other, what is the resultant acceleration of the object? 40 N a. 12 my b. 3.0 m/s e. 25 m/s' 25N d. 47 m/'s 18. An automobile of mass 2 000 kg moving at 30 m's is braked suddenly with a constant braking force of 10 000 N. How far does the car travel before stopping? a. 45 m b. 90 m c. 135 m d. 180 m 19. A sled weighs 100 N. It is held in place on a frictionless 20" slope by a rope attached to a stake at the top: the rope is parallel to the slope. Find the tension in the rope. b. 47 N e. 37 N dH4N 20. A 500-N tightrope walker stands at the center of the rope such that each half of the rope makes an angle of 10.0" with the horizontal. What is the tension in the roper (T," a. 1 440 N b. 1 00ON c. 500 N d. 2 900 N T SOON