What am i doing wrong for the direction? I pluged in the formula (arctan F g /F

Question

What am i doing wrong for the direction? I pluged in the formula (arctan Fg/Fcar) and got 77.6 Them i subtracted that from 90 degrees but it says my answer is still wrong

A 1040 kg car is pulling a 320 kg trailer. Together the car and trailer move forward with an acceleration of 2.16 m/s2. Ignore any frictional force of air drag on the car and all frictional forces on the trailer. (a) Determine the net force on the car. magnitude 2246 direction forward (b) Determine the net force on the trailer. magnitude 691 direction forward (c) Determine the force exerted by the trailer on the car. magnitude 691 direction backward (d) Determine the resultant force exerted by the car on the road. (Assume that the forward direction is along the+x-direction.) magnitude 10436 direction 12.43 Your response differs from the correct answer by more than 10%. Double check your calculations."(measured from the left of the-y direction)

Explanation / Answer

Now we find the direction of the resultant force exerted by the car on the road

direction =tan^-1{691/2246]=17.1 degee

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