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What are the sources of errors in youngs modulus experiment?
One inaccuracy can be that the wire or material that you are using to find Young's Modulus has some impurities and there may be a slight variation in the cross sectional area so a shorter piece of that material should be used.
What is a cantilever?
A cantilever is a beam supported at one end. A diving board is anchored at one end and hangs out over the pool. It's a cantilever. More can be learned by using the link and looking at some pictures while reading the Wikipedia article.
Is 84280 MPa OK for young's modulus using 2024 alloy dog bone test pieces?
That sounds a little high. Young's modulus for 2024 is about 73,100 MPa
Briefly explain another method to determine modulus of rigidity?
By using tensile test.
Modulus of rigidity of rubber?
The modulus of elasticity , E, relates tensile stress to tensile strain The modulus of rigidity, G, relates shear stress to shear strain The bulk modulus, K, relates compressive stress to volume strain The three are related using u, poisson ratio of material, that varies generally from 0 to 0.5 E = 9K/ (1 + 3K/G) G = E/2(1+u) G = 3(1-2u)K/2(1+u)
