il AT&T; 10:39 AM 53%) a edugen.wileyplus.com Cutnell, Physics, 10e eview Itraci

Question

il AT&T; 10:39 AM 53%) a edugen.wileyplus.com Cutnell, Physics, 10e eview Itracive Solution 2/ss una the diver sees a trtcet Chapter 02, Problem 33 G2. matiem 11 Review Interactive Solution 2.33 in preparation for this problem. Suppose 17a car is traveling at +18.3 m/s, and the driver sees a traffic light turn red. S 2 After 0.209 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 4.00 m/s'. What is the stopping distance of the car, as measured from the point where the driver first notices the red light? the tolerance is +/-2% f you

Explanation / Answer

Distance travelled during 0.209 s (the rection time) = 18.3*0.209 = 3.8247 m

Distace travelled during deceleration at 4 m/s2 will be given by

v2-u2 = 2aS

(0)2 - (18.3)2 = 2*(-4)*S

S = 41.86125 m

Stoping distance from beginning will be = 3.8247+41.86125 = 45.68595 m

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