Stopping a Car Due in 1 hour, 19 minutes Calculate the force needed to bring a 780-kg car to rest from a speed of 77.0 km/h in a distance of 113 m (a fairly typical distance for a non-panic stop). Submit Answer Tries 0/10 Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 1.92 m. Calculate the force exerted on the car and compare it with the force found in part (a), i.e., take the ratio of the force when the car hits the concrete abutment to that in part (a). Force = Ratio = Submit Answer Tries 0/10 This discussion is closed. Send Feedback