What are the 2 major organizations that develop symbols for use throughout different engineering disciplines

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Aregular polygon has angkes of size 150° each.how many side has the polygon

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =