The string that will break first depends on the weight of the block or bar subjected to such string.
According to Hook's law, the force applied to an elastic material is directly proportional to the extension of the material.
F= kx
where;
For given two identical strings, the string that will break first depends on the mass of the bar and the block.
Thus, the string that will break first depends on the weight of the block or bar subjected to such string.
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