PROBLEM 3.1 Determine the torque T which causes a maximum shear stress of 70 MPa in the steel cylindrical shaft shown. [Ans. 641 Nm]

Find the corresponding curves to match formulae of boundary work (one of the curves is isothermal process).                                                    Curve A                                                  Curve B                                                  Curve C A. Wb = PVln(V2/V1) B. Wb = P (V2 -V1) C. 0

consider a crane with a 30 pound ball suspended from a 40 foot cable that weighs 5 pounds per foot.a) find the work required to wind up 15 feet of hte apparatus.b) find the work required to wind up all 40 feet of the apparatus.

A new type of energy absorber is being designed as a buffer at the end of track at a fairground.It consists of a piston with small holes that moves in a cylinder containing oil, so that the kineticenergy of impact is absorbed as heat by the oil.a) Draw a sketch for the instant of impact by a vehicle of mass 2500kg moving at 30mphshowing the forces and energy transfers involved.b) Write down the first law of thermodynamics for a system and identify terms that are notrelevant if the oil is taken as the system.c) How much heat transfer to the surroundings is required to return the oil to its originaltemperature after an impact by a 2500kg vehicle moving at 30mph?