Question: An automobile begins a braking test with a velocity of 90 ft/s at t = 0 and comes to a stop at t = t1

An automobile begins a braking test with a velocity of 90 ft/s at t = 0 and comes to a stop at t = t1 with the acceleration record shown. Knowing that the area under the a??tcurve from t = 0 to t = T is a semiparabolic area, use the method of Sec. 11.8 to determine the distance traveled by the automobile before coming to a stop if

(a) T = 0.2 s,

(b) T = 0.8 s.

a (ft/s) 0 -24 T 1 1 1 1

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