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PHY GROUP LAB

# PHY GROUP LAB - Group A Youngs Modolus of Elasticity...

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Group A: Young’s Modolus of Elasticity √ Purpose: In this experiment, we used weights to stretch metal wires and then measure how much they stretched under the force of that added weight. There are 4 wires and by comparing the data, we can find how wires of different length, diameter, and composition respond to the added force. The micrometer is used to measure the stretch of the wires. The horizontal axis is leveled initially and as the wire is stretched, we would have to adjust the micrometer screw so the bar is leveled again, in which the difference will tell you how far the wire actually stretched. Experimental Set-Up: The wires: 1] Wire 1: A steel wire approximately 2m long 2] Wire 2: A steel wire, same diameter of Wire 1 but half as long 3] Wire 3: A steel wire, same length as Wire 1 but thicker diameter 4] Wire 4: A copper wire, same length and diameter as Wire 1 The wires are suspended from a frame (see figure 1) and are suspended by clamps. There is a load placed on each wire and we use a micrometer to measure how much they stretch under the added load. Hooke’s Law: describes forces that linearly with a displacement The stretch of the wire ΔL corresponds to the “generalized displacement q”, and the added force ΔF corresponds to the “generalized force F”. K is a constant (called force constant). Spring constant k expresses how much force is needed to stretch or compress the spring a given distance.

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PHY GROUP LAB - Group A Youngs Modolus of Elasticity...

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