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HW06-problems

# HW06-problems - markowitz(am45362 HW06 distler(56295 This...

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markowitz (am45362) – HW06 – distler – (56295) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points A spring is compressed between two cars on a frictionless airtrack. Car A has four times the mass of car B, M A = 4 M B , while the spring’s mass is negligible. Both cars are initially at rest. When the spring is released, it pushes them away from each other. Which of the following statements correctly describes the velocities, the momenta, and the kinetic energies of the two cars after the spring is released? Note : Velocities and momenta are given below as vectors. 1. vectorv A = - 2 vectorv B vectorp A = - 8 vectorp B K A = 16 K B 2. vectorv A = + 1 5 vectorv B vectorp A = + 4 5 vectorp B K A = 4 25 K B 3. vectorv A = - 1 3 vectorv B vectorp A = - 2 3 vectorp B K A = 4 3 K B 4. vectorv A = - vectorv B vectorp A = - 4 vectorp B K A = 16 K B 5. vectorv A = - vectorv B vectorp A = - vectorp B K A = K B 6. vectorv A = - 4 vectorv B vectorp A = - 16 vectorp B K A = 64 K B 7. vectorv A = + 1 4 vectorv B vectorp A = + vectorp B K A = 4 K B 8. vectorv A = - 1 2 vectorv B vectorp A = - 2 vectorp B K A = K B 9. vectorv A = - 1 4 vectorv B vectorp A = - vectorp B K A = 1 4 K B 10. vectorv A = - 1 4 vectorv B vectorp A = - vectorp B K A = 4 K B 002 10.0points Two objects of mass 9 g and 6 g , respectively, move parallel to the x -axis, as shown. The 9 g object overtakes and collides with the 6 g object. Immediately after the collision, the y -component of the velocity of the 9 g object is 6 m / s upward. v i 9 g v i 6 g What is the y -component of the velocity vectorv of the 6 g object immediately after the collision? 1. vectorv y = 8 m / s downward 2. vectorv y = 3 . 5 m / s downward 3. vectorv y = 6 . 66667 m / s downward 4. vectorv y = 14 m / s downward 5. vectorv y = 9 m / s downward 6. vectorv y = 7 m/s upward

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markowitz (am45362) – HW06 – distler – (56295) 2 7. vectorv y
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HW06-problems - markowitz(am45362 HW06 distler(56295 This...

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