A woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210 m from the deer. If the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?

Question

Francis Savage

Physics

13 September, 11:40

A woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210 m from the deer. If the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?

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Answers (1)

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Sierra Waters · Answer 1

Velocity initial = 23 m/s

velocity final = 0m/s (car comes to a stop)

distance = 210 m

a=?

plug it in

0 = (23) ^2 + 2 (a) (210)

-529=420a

a = - 1.26 meters per seconds squared