PHYS 6A Lecture Notes - Lecture 20: Elastic Modulus
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A compressed spring (x<0) pushes in the +x direction. A stretched spring (x>0_ pulls in the -x direction. Relates to stress and strain y = stress/strain. A steel wire 10m long 2mm in diameter is attached to the ceiling and a 200n weight is attached to the end. An elastic deformation (strain) is directly proportional to the magnitude of the applied force per unit area (stress) Steel stud is s = 8. 27 x 10^10 projects 4cm from the wall if 36,000f is applied to end. If you double the force on the cylinder, the stress will be: If you double the force on the cylinder, the strain will be: If you double the force on the cylinder, the distance the cylinder stretches will be: If force and length of the cylinder stay the same but you double the radius, the stress will be:
