What is the final speed of a car that accelerate from rest at 5m/s2 for 15 s?

Most energy in an ecosystem comes originally from_

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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