My problem invloves a car with a mass of 1520kg. It's traveling with a speed of 15.0 m/s. I'm asked to find the magnitude of the horizontal net force that is require to bring the car to a halt at 57.5m. My reasoning begins, in that I think I should be finding the acceleration and once I've found the acceleration I can find the total force. But, this is producing a rather large number for me that is negative. To find the acceleration I used the equation: a = V^2 - Vo^2 / 2x Using that equation my answer was -1.96 I then plugged that into the equation for net force which was: net force = m(a) Plugging in the variables I know in that got me the answer -2973.9 But I can't imagine that this is correct. Any help would be appreciated.