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(a) How far will the car travel before it overtakes the truck?

(b) How fast will the car be travelling when it overtakes the truck?

Calculations (a) :

Car:

Vi = 0 m/s

Vf = ?

Acceleration = 6.0 m/s^2

Truck:

Vi = 21 m/s

Vf = 21 m/s

Acceleration = 0 m/s^2

* in order to figure out (a), the deltaD's of both the car and truck must be equal

- i'm not to sure if the deltaT will be the same but it seems as though the intial time is the same

This is all I know so far; I've been trying to sub in equations but nothing seems to work. Could someone please guide me in the right direction. Thanks :)