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Q. A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move down the plane to that when it move up the plane would be in the regions

  • (A) 8 ? 10
  • (B) 5 ? 7
  • (C) 2 ? 3
  • (D) 4 ? 6
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