The crank OB rotates about a fixed axis passing through O with a constant angular velocity ω. Roller A moves in a vertical groove. At the position on the figure, bar OB is vertical, OA is horizontal. Determine the angular velocity of rod AB, the speed of roller A; angular acceleration of rod AB, acceleration of roller A. Let ω = 1.5 rad/s, r = 1 m.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor

What is creep? what is stress relaxation?