If the car is going 55 m/s, how many meters will it take to stop?

I'm a little confused, I got that the acceleration is -11 m/s2 and the velocity is 55m/s but when the car stops is the final velocity 0? And would we use that to find the distance with vi and vf?

I tried solving it out that way and got d=137.5 but I'm not sure if I used the right formula and if it's correct.

Someone explain please? Thanks in advance!

## Answers (1)

USE THE KINEMATIC EQUATION

V^2 = V(0)^2 + 2A*X

YOUR FINAL VELOCITY IS ZERO BECAUSE IT WILL BE STOPPED AT THE END

SO....

0 = 55^2 +2*(-11)*X

D = 137.5 M

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