The car starts to brake at the speed of 10m / s, the acceleration is 2m / S2, and the displacement ratio of 3S, 2S and 1s before stopping is calculated

The car starts to brake at the speed of 10m / s, the acceleration is 2m / S2, and the displacement ratio of 3S, 2S and 1s before stopping is calculated

Reverse thinking: displacement ratio of 3S, 2S and 1s before stopping = uniform acceleration linear motion with initial velocity of 0, displacement ratio of 3S, 2S and 1s before starting motion = 5:3:1