Physics-
General
Easy

Question

A student calculates the acceleration of m1 in figure shown as a subscript 1 end subscript equals fraction numerator open parentheses m subscript 1 end subscript minus m subscript 2 end subscript close parentheses g over denominator m subscript 1 end subscript plus m subscript 2 end subscript end fraction Which assumption is not required to do this calculation.

  1. pulley is frictionless    
  2. string is massless    
  3. pulley is massless    
  4. string is inextensible    

The correct answer is: pulley is massless

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