The acceleration of a car traveling at 10m / s after emergency braking is 4m / S ^ 2. How much displacement of the car within 2S after braking and how much displacement is within 3S after braking?

Time taken when braking stops:
T brake = VO / a = 10 / 4 = 2.5s
The car was still decelerating at 2 seconds
S1 = volt at ^ 2 / 2 = 10 * 2-4 * 4 / 2 = 20-8 = 12m (first question)
Three seconds after braking, it stopped moving
S Brake = VO ^ 2 / 2A = 100 / 8 = 12.5m (second question)

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