La cantidad de cifras significativas de 101,0 m es?

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

It is really hard for me right know

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created