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BROSE0407 BROSE0407
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Posts: 511
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6 years ago
An electron in a cathode ray tube is accelerated through a potential difference of 10 kV. What kinetic energy does the electron gain in the process? (e = 1.6  10-19 C)
 a. 8.0  10-16 J
  c. 8.0  1022 J
  b. 1.6  10-15 J
  d. 1.6  10-16 J



[Ques. 2] During a snowball fight, two balls with masses of 0.4 and 0.6 kg, respectively, are thrown in such a manner that they meet head-on and combine to form a single mass. The magnitude of initial velocity for each is 20 m/s. What is the speed of the 1.0-kg mass immediately after collision?
 a. zero
  c. 4 m/s
  b. 3 m/s
  d. 5 m/s



[Ques. 3] A uniform electric field, with a magnitude of 600 N/C, is directed parallel to the positive x axis. If the potential at x = 4.0 m is 1000 V, what is the change in potential energy of a proton as it moves from x = 4.0 m to x = 1.0 m? (qp = 1.6  10-19 C)
 a. 500 J
  c. 1.9  10-16 J
  b. 2.9  10-16 J
  d. 8.0  10-17 J



[Ques. 4] A 70-kg man is standing in a 20-kg boat. Thinking he is stepping out onto the dock, the man steps to the right. However, the following will actually happen (ignore the friction of the water or air on the boat or the man):
 a. The man only moves a short distance to the right while the boat moves a larger distance to the left.
  b. The man actually stays still while the boat moves toward the left.
  c. The boat doesn't move and the man moves to the right.
  d. None of the above.



[Ques. 5] A uniform electric field, with a magnitude of 600 N/C, is directed parallel to the positive x axis. If the potential at x = 4.0 m is 1000 V, what is the potential at x = 2.0 m?
 a. -800 V
  c. 2800 V
  b. 2200 V
  d. 1600 V



[Ques. 6] If a twobody collision is not headon, then we may always assume that:
 a. momentum is conserved. b. kinetic energy is conserved. c. neither momentum nor kinetic energy are conserved. d. both momentum and kinetic energy are conserved.



[Ques. 7] The quantity of electrical potential, the volt, is dimensionally equivalent to:
 a. force/charge.
  c. force  charge.
  b. electric field/distance.
  d. electric field  distance.



[Ques. 8] A 6-kg object is moving to the right at 4 m/s and collides with a 4-kg object moving to the left at 6 m/s. The objects collide and stick together. After the collision, the combined object:
 a. has the same kinetic energy that the system had before the collision.
  b. has more kinetic energy than the system had before the collision.
  c. has no kinetic energy.
  d. has less momentum than the system had before the collision.



[Ques. 9] The unit of electrical potential, the volt, is dimensionally equivalent to:
 a. J/C.
  c. FC.
  b. JC.
  d. C/J.



[Ques. 10] Popeye, of mass 70 kg, has just downed a can of spinach. He accelerates quickly and stops Bluto, of mass 700 kg (Bluto is very dense), who is charging in at 5.0 m/s. What was Popeye's remarkable speed?
 a. 10 m/s
  c. 50 m/s
  b. 31 m/s
  d. 100 m/s
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KdayKday
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Rep: 9 0
6 years ago
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BROSE0407 Author
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6 years ago
Dude, you're awesome. I wish I had you as my teacher!
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