A .25" x .25" square specimen of a material of yield strength 50000 psi is loaded to this yield point and released. The modulus of elasticity of the materials is 30 X 10^6 psi. Orginal gage length is 2". What is the force required to load the speciment to yeild point? What is the length of the specimen when the load is held at yield point and what is the length of the specimen when the load is released?