Current Attempt in Progress Car lengths in trailing. When trailing a car on a highway, you are advised to maintain a trailing distance that is often quoted in terms of car lengths, such as in \"stay back by 3 car lengths.\" Suppose the other car suddenly stops (it hits, say. a large stationary truck]. Assume a car length L is 4.50 m, your car speed v0 is 32.0 m/s (71.6 mi/h), your trailing distance is nl. = 10.011, and the acceleration magnitude at which your car can brake is 8.20 m/sz. What is your speed just before colliding with the other car if {a} your reaction time t, to start braking is 0.560 s and (b) automatic braking is immediately started by your car's radar system that continuously monitors the road? What is the minimum value for n needed to avoid a collision with {c} the reaction time I, and {d} automatic braking? {a} Number n Units v {b} Number n Units v {c} Number n Units v {d} Number n Units v