SOLUTION: PLEASE HELP ME TO SOLVE IT!!!!!!!!!!!!!!!!!!!! the car velocity is 100 km/h. Suddenly the driver sees a elk 120 m from the car standing on the road. the drivers reaction time is 1

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Question 757593: PLEASE HELP ME TO SOLVE IT!!!!!!!!!!!!!!!!!!!!
the car velocity is 100 km/h. Suddenly the driver sees a elk 120 m from the car standing on the road. the drivers reaction time is 1.5 s after which time the driver starts breaking. The car stops in 4 s. Calculate the distance between the standing elk and the car after the car has stopped. Give the answer in 1 m precision.
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
v=100+km%2Fh=100000m%2F3600s=27.78%28m%2Fs%29=28%28m%2Fs%29
t=4s
d%5B1%5D=27.78%28m%2Fs%29%2A1.5s=41.67m=42
find acceleration as “change in velocity” :
a=v%5B0%5D-v=-%2828%28m%2Fs%29%2F4s%29=-7%28m%2Fs%5E2%29
d=%281%2F2%29at%5E2%2Bvt%2Bd%5B1%5D
d=%281%2F2%29%28-7%28m%2Fs%5E2%29%29%284s%29%5E2%2B28%28m%2Fs%294s%2B42m

d=-3.5m%2A16%2B112m%2B42m%0D%0A%0D%0A%7B%7B%7Bd=-56m%2B154m
d=98m