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211 (S07) Make-up quiz - MCa1

# 211 (S07) Make-up quiz - MCa1 - direction of motion C The...

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Multiple Choice –  5 Questions                   x 2pts =                  Please write your answers in the space provided. # correct score 1. You leap from a bridge with a bungee cord tied around your ankles. As you approach the river below, the bungee cord stretches and you begin to slow down. The force of the cord on your ankles to slow you is your weight. A. less than B. equal to C. greater than D. There is not enough information to say. 2. A brick weighing  50 Newtons  slows as it slides 4 m across a horizontal floor.  If  the coefficient of kinetic friction between  the brick and  the floor is  μ k  = 0.2, the  change in kinetic energy (in Joules) is: A. -100 B. -40 C. 0 D. +40 E. +100 3. The velocity of a car on a straight road has been plotted as a function of time, as shown. Which of the following statements is true of the car? A. The net force on the car is zero. B. The net force on the car is directed opposite the

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Unformatted text preview: direction of motion. C. The net force on the car is in the same direction as the motion. D. The net force is perpendicular to the motion. 4. A large truck collides head-on with a small compact car. During the collision: A. the truck exerts a greater amount of force on the car than the car exerts on the truck. B. the car exerts a greater amount of force on the truck than the truck exerts on the car. C. neither exerts a force on the other, the car gets smashed simply because it gets in the way of the truck. D. the truck exerts a force on the car but the car does not exert a force on the truck. E the truck exerts the same amount of force on the car as the car exerts on the truck. 5. A car moving at 30 km/hr skids 20 m with locked brakes. How far will the car skid (on the same surface) if it is traveling at 90 km/hr? A. 60 m B. 90 m C. 120 m D. 180 m E. 240 m 1. 3. 4. 2. 5. time velocity v = 0...
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211 (S07) Make-up quiz - MCa1 - direction of motion C The...

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