Hooke’s Law defines the relationship between stress and strain. We also have a few other equations that relate stress and strain to other aspects of a material. where is stress, E is the elastic modulus, is strain, F is force, A0 is the cross sectional area, l is length, l0 is initial length, d0 is the initial diameter, and d is the diameter.

Determine the initial length, in mm, of the cylindrical sample given the following and save as prob03

E = 207 GPa d0 = 10.2mm F = 8900 N Δl = 0.25 mm

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.