When the car is in emergency braking, the acceleration is 2m / s Square, and the original speed of the car is 10m / s (1) How long does it take for the car to stop after braking? (2) What is the displacement of the car from braking to stopping?

When the car is in emergency braking, the acceleration is 2m / s Square, and the original speed of the car is 10m / s (1) How long does it take for the car to stop after braking? (2) What is the displacement of the car from braking to stopping?

1. Let the direction of motion be positive,
Vt=V0+at.
t=5s.
2,X=V0t+1/2at^
X=25m.
Note: "square" means square
After 5 seconds stop movement, displacement of 25 meters