Physics-
General
Easy

Question

A block of mass ' m ' is attached to two unstretched springs of spring constants k subscript 1 end subscript & k subscript 2 end subscript as shown in figure. The block is displaced towards right through a distance x and is released. Find the speed of the block as it passes through the mean position?

  1. x square root of fraction numerator k subscript 1 end subscript plus k subscript 2 end subscript over denominator m end fraction end root    
  2. x square root of fraction numerator m over denominator open parentheses k subscript 1 end subscript plus k subscript 2 end subscript close parentheses end fraction end root    
  3. x square root of fraction numerator k subscript 1 end subscript minus k subscript 2 end subscript over denominator m end fraction end root    
  4. x square root of fraction numerator m over denominator open parentheses k subscript 1 end subscript minus k subscript 2 end subscript close parentheses end fraction end root    

The correct answer is: x square root of fraction numerator k subscript 1 end subscript plus k subscript 2 end subscript over denominator m end fraction end root

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