Physics ( Acceleration of Car)?

Question

A 7kg object hangs at one end of a rope that is attached to a support on a railroad boxcar. When the car acelerates to the right, the rope makes and angle of 37 degrees with the vertical. The acceleration of gravity is 9.8 m/s2. Find the acceleration of the car.

Answer 1

This is a vector problem. I believe the answer is 9.8tan(37).