a car starts from rest at a point 300m from a truch that is moving at a constant rate of 30m/s toward the car. IF the car accelerates at .8m/s2, determine the time it take for the car and the truck to meet.(adsbygoogle = window.adsbygoogle || []).push({});

s=300

This is what I did

Car:

Vi = 0, a = .8

Vf^2=2as = Vf=21.9

Vf=at

21.9/.8 = 27.38

t=27.38sec

Truck:

S=(V/2)t

S=(15)t

300/15 = 20

t=20

They meet after (27.38 -20) = 7.38 seconds.

The answer given is 8.94seconds. Not sure what I am doing wrong?????

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# Homework Help: Determine the time it take for the car and the truck to meet

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