p140w06_exam_1_4

p140w06_exam_1_4 - Physics 140 Winter 2006 Exam#1 Please...

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1: The coefficients of friction between the incline and the block are as follows: μ s = 0.8, μ k =0.74 Which of the following statements about this situation is true? a) If the block is placed at rest on the incline it will begin to slide. b) If the block is placed at rest on the incline it will remain motionless. If it is then given a shove down the incline it will begin to accelerate downward. c) If the block is placed at rest on the incline it will remain motionless. If it is then given a shove down the incline it will slow down and stop after the shove is over. d) If the block is placed at rest on the incline it will remain motionless. If it is given a shove down the incline it will move at a constant speed down the incline after the shove is over. e) The block will begin to slide downward after it is placed at rest on the incline, but it will quickly slow down and come to a stop after it travels a short distance. 2: x ×  y y × x = a) z b) -1 c) 1 d) 0 e) 2
3: A motorcycle travels due south 25 m/s relative to the highway. An SUV travels at the same speed relative to the highway, but at a heading of 30 degrees south of east. What is the speed of the SUV relative to the motorcycle?

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• Fall '07
• Evrard
• Physics, Force, Friction, Velocity, section section section, Svetlana Malinovskaia Svetlana Malinovskaia Svetlana Malinovskaia Ctirad Uher Ctirad Uher Ctirad Uher

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