A horse begins trotting at 3.0 mi/hr North and increases its velocity to 10.0 mi/hr N over 7.0 minutes. What is the acceleration of the horse? answer in mi/hr/hr

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.