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Standard XII
Physics
Question

A body is sliding down on a rough inclined plane of inclination 450. The time taken by it to slide down on the rough inclined plane is 3 times the time taken by the body to slide down the smooth inclined plane of same inclination. The coefficient of friction between rough inclined plane and the body is
  1. 1/3
  2. 2/3
  3. 1/9
  4. 8/9

A
1/3
B
1/9
C
2/3
D
8/9
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