Physics-
General
Easy

Question

A body of mass M is moving with a uniform speed of 10 blank m divided by s on friction less surface under the influence of two forces F subscript 1 end subscriptand F subscript 2 end subscript. The net power of the system is

  1. 10 F subscript 1 end subscript F subscript 2 end subscript M    
  2. 10 open parentheses F subscript 1 end subscript plus F subscript 2 end subscript close parentheses M    
  3. open parentheses F subscript 1 end subscript plus F subscript 2 end subscript close parentheses M    
  4. Zero    

The correct answer is: Zero


    because Speed is constant
    therefore Work done by forces = 0
    therefore Power equals fraction numerator W o r k over denominator T i m e end fraction equals 0

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