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Masses M_(1),M_(2) and M_(3) are connected by string of negligible mass which pass over massless and frictionless pulleys P_(1) and P_(2) as shown in figure 7.15. The masses move such that the string between P_(1) and P_(2) is parallel to the incline and the portion of the string between P_(2) and M_(3) is horizontal. The masses M_(2) and M_(3) are 4.0 kg each and the coefficient of kinetic friction between the masses and the surfces is 0.25. The inclined plane makes an angle of 37^(@) with the horizontal. If the mass M_(1)moves downwards with a uniform velocity, find (i) the mass of M_(1), (ii) the tension in the horizontal portion. (g=9.8 ms^(-2) , sin 37^(@)=(3)/(5)) |
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