Breaking point of a wire is measured on a spring scale.

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(C)Properties of Heat and Matter - C+90: Mechanical Properties of Materials

Breaking point of a wire is measured on a spring scale. In this apparatus, a wire is attached at one end to a spring scale, and at the other end to a cylinder that can be cranked. The tension in the wire is maintained by a ratchet wheel and pawl mechanism. The breaking point of the wire can be read in kilograms on the spring scale. MECHANICAL PROPERTIES OF MATERIALS
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C+90+5
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C+90+10 Young's modulus of elasticity: Weight stretches wire.