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Ram Sharma • 193.88K Points
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Q. An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the windless makes 30 rpm. The efficiency of the inclined plane would be

  • (A) 41%
  • (B) 61%
  • (C) 26.50%
  • (D) 53.05%
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