A horizontal, circular track for running has four lanes, as shown in the figure. Various runners of different masses use the track. In each case, the center of mass of a runner follows a circular path around the track in one of the lanes.Now consider four runners running around the track with the same constant tangential speed, with one runner in each lane of the track. A student is considering using the following equations to determine which runner has the greatest acceleration.Equation 1: v^2x=v^2x0+2ax(x−x0)Equation 2: ac=v^2/rWhich equation should the student use, and why?