free body diagram help

1. The problem statement, all variables and given/known data

http://ift.tt/1i5b9ph

For the car why is the friction acting towards the left. Shouldn’t it be towards the right since the car is moving to the left

And why is there no friction for the trailer?

2. Relevant equations

3. The attempt at a solution

http://ift.tt/1hllTPl

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