Elasticity & Hooke's Law - Intro to Young's Modulus, Stress & Strain, Elastic & Proportional Limit

This physics video tutorial provides a basic introduction into elasticity and hooke's law. The basic idea behind hooke's law is that the change in length of a stretching or compressing an object is proportional to the force applied up to the proportional limit. The elastic limit is the point up to which an object can return to its natural state if the external force is removed. Beyond the elastic region lies the plastic region where an object will not return to its natural length if the external force is removed but it experiences permanent deformation. If the force passes the breaking point, the object will snap in two. The ultimate strength is maximum force that an object can withstand without breaking in two. Stress is the ratio of force and area. Stress is the external pressure applied to an object where as strain is the material's response to that stress. Strain is the ratio between the change in length of the object and its original length. The elastic modulus or young's modulus is the ratio between stress and strain. This video provides the equations and formulas needed to perform calculations associated with young's modulus /elastic modulus, stress, and strain.
Static Equilibrium:
• Static Equilibrium - T...
Elasticity and Hooke's Law:
• Elasticity & Hooke's L...
Tensile Stress:
• Tensile Stress & Strai...
Elastic Modulus:
• Stress & Strain - Elas...
Bulk Modulus:
• Bulk Modulus of Elasti...
___________________________
Volume Unit Conversion:
• How To Convert Cubic C...
Specific Gravity & Density of Mixtures:
• Specific Gravity and D...
Will It Sink or Float?
• Will It Sink or Float?
Intro to Pressure & Fluids:
• Introduction to Pressu...
Atmospheric Pressure Problems:
• Atmospheric Pressure P...
____________________________
The Gallon Crusher:
• Physics - Fluids & Pre...
Absolute Pressure Vs Gauge Pressure:
• Absolute Pressure vs G...
Water Pressure Vs Gauge Pressure:
• Water Pressure, Gauge ...
Full-Length Videos and Worksheets:
/ collections
Physics PDF Worksheets:
www.video-tuto...

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Can we say that the Young Modulus is the amount of force needed to stretch 1m^2 of a material to twice its size? Because if A = 1m^2 and deltaL = L0 (meaning that the material has got to twice its original size), then F = E. If the material stays in the proportional limit during the stretch, I think this is safe to say. What do you guys think?

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15:01 Is the F directly proportional to the E??????

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