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A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in the figure. Initially, the spring is in the natural state. Then the maximum positive work that the applied force F can do is : 
[Given that spring does not break]
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A block attached to a spring, pulled by a constant horizontal force, i...
Applying work-energy theorem on the block, we get
Fl − kt2/2 = 0
l = 2F/k 
or work done = Fl = 2F2/k
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Most Upvoted Answer
A block attached to a spring, pulled by a constant horizontal force, i...
Applying work-energy theorem on the block, we get
Fl − kt2/2 = 0
l = 2F/k 
or work done = Fl = 2F2/k
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Community Answer
A block attached to a spring, pulled by a constant horizontal force, i...
Applying work energy theorem on block


or work done  
The correct answer is:  
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A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in the figure. Initially, the spring is in the natural state. Then the maximum positive work that the applied forceFcan do is :[Given that spring does not break]a)b)c)∞d)Correct answer is option 'B'. Can you explain this answer?
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