Question

Two cars are driving at the same constant speed on a straight road, with car 1 in front of car 2. car 1 suddenly starts to brake with constant acceleration and stops in 10 m. at the instant car 1 comes to a stop, car 2 begins to brake with the same acceleration. it comes to a halt just as it reaches the back of car 1. what was the separation between the cars before they starting braking?

Answer 1

 Maths delivers! Braking distance ... If the car is initially travelling at um/s, then the stopping distance d m ... the speed of the car at the instant the brakes are applied. ... An object with constant acceleration travels the same distance as it would ... We start with the second equation of motion:.