With the brakes fully applied , a 1470 kg automobile decelerates at the rate of 7.5 m/s^2. a) what is the magnitude of the breaking force acting on the automobile? 1470 *7.5=11025N ( I think this is correct) b)if the initial speed is 90km/h (25 m/s) what is the stopping distance? im thinking 25/7.5=3.33s 3.33*25=83.25 m c)what is the work done by the breaking force at 90km/h. part a) *part b)=J d) what is the change in kinetic energy of the automobile? 1/2mv^2 I believe I know how to do the proceeding parts but I need the previous values.