Question

ppose the driver in this example is now moving with speed 38.9 m/s, and slams on the brakes, stopping the car in 4.4 s.
(a) Find the acceleration assuming the acceleration is constant.



(b) Find the distance the car travels, assuming the acceleration is constant.





(c) Find the average velocity.

Answer 1

(a) 38.9 + 4.4a = 0, so a = -8.84 m/s^2
(b) s(t) = 38.9t + 1/2 at^2
(c) avg v is (38.9+0)/2

Answer 2

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