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Easy

Question

System shown in figure is released from rest. Pulley and spring is massless and friction is absent everywhere. The speed of 5 kg block when 2 kg block leaves the contact with ground is (Take force constant of spring k = 40 N/m and g = open 10 m divided by s to the power of 2 end exponent close parentheses:
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  1. square root of 2 m divided by s    
  2. 2 square root of 2 m divided by s    
  3. 2 m/s    
  4. 4 square root of 2 m divided by s    

The correct answer is: 2 square root of 2 m divided by s

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