The students in Mr. Durbin's advanced physical science class finally had enough of his lame jokes and have decided to revolt. They are currently dragging his 75 kg body around the classroom with a force of
200 Newtons. If they started from rest, how fast (velocity) would they be dragging Mr. Durbin after 3
seconds?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.