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    String Attached to a Block on a Horizontal Surface

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    Consider a string attached to a block on a horizontal surface. If you gradually pull very gently and horizontally on the string and increase the force very slowly until the block moves at a constant velocity. What happens to the frictional force just as the block begins to slide? Explain.

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    Solution Preview

    We analysis three different status of the block.
    In the first phase, the block does not move. It is ...

    Solution Summary

    A string attached to a block on a horizontal surface is given. The solution includes a diagram and brief explanation. The solution is 75 words.