Young Modulus of Copper

Physics TAS Young Modulus of Copper Objectives -Determine the Young modulus of copper by simple experiment -Study the relationship of strain and stress between elastic and plastic deformations of copper -Verify a wire will not return to its original length after certain extensions Preview Questions .Hooke's Law states that the elastic force is directly proportional to the extension (or compression) of the elastic body. A wire obeys Hooke's Law only if it is within its elastic limit. 2.Elastic deformation means a stretched wire will return to its natural length. If the wire is stretched beyond its elastic limit, it will not return to the original length and will make permanent extensions. This is called plastic deformation. 3.A longer wire will extend more than a shorter wire of the same cross-sectional area under the same applied force. 4.As in Q.3 , force constant can be easily affected by geometric factors such as length and cross sectional area. But the stiffness of materials depends on their Young modulus only, which is not affected by geometric factors. So force constant is not a good quantity to compare the stiffness of materials. Apparatus Copper wire ..................1 roll slotted mass with hanger 100g hangers ....................1 100g slotted mass .........~15

  • Word count: 1787
  • Level: AS and A Level
  • Subject: Science
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