A spring block system is placed on a rough horizontal floor. The block is pulled towards right to give the spring some elongation and released. Then:
A
The block may stop before the spring attains its mean position.
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B
The block must stop with spring having some compression.
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C
The block may stop with spring having some compression.
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D
It is not possible that the block stops at mean position.
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Solution
The correct options are A The block may stop before the spring attains its mean position. B The block may stop with spring having some compression. As the horizontal floor is rough, so a friction force act when the spring released. So the block may stop before the spring attains its mean position and the block may stop with spring is having some compression.