Alight rod ad is supported by frictionless pegs at r and c and rests against a frictionless wall at a. a vertical 120-lb force is applied at d. determine the reactions at a, b, and c.

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.

On a average work day more than work place firs are reorted

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?