1. The problem statement, all variables and given/known data An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 850 kg traveling initially at a speed of 51.0 km/h in a distance equal to the diameter of a dime, which is 1.8 cm? Answer must be in two sig. figs. 2. Relevant equations V² = u² + 2 a*s F(net) = m*a 3. The attempt at a solution 51 km/h = 14.16 m/s 0= (14.16)^2 + 2a(0.018) a= 200.5 / -0.036 a= -5,569.4 m/s^2 850 kg * -5569.4 = Fnet Fnet = 4,734,027.78 N (this is 2 sig figs right)? Did I do this right? If I did, why exactly do I receive -0.036?(I just multiply 0.018 but I don't really understand why.) Thanks.