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Standard XII

Physics

Shear Stress

A spring bloc...

Question

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:

The block may stop before the spring attains its mean position.

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The block must stop with spring having some compression.

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The block may stop with spring having some compression.

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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.

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