The bar ab performs a plane motion in vertical plane so that the extremity a describe with constant velocity va = vo = 0,5 m/s the horizontal, fixed straight line, and it resting in the fixed point c. calculate and represent the velocity and acceleration of the point b, the minimum velocity on the rod ab at the instant t1 = 1s from the start of the motion and represent the distribution of velocities on the rod at the same instant. it is known that in the initial instant the rod is in rest in vertical position and has the length lab = 1,5m.

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.