Someone pls help me with this

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

Which of the following are appropriate acceleration units?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass