So I'm struggling with this question, and am wondering if anyone can give me the right direction to go. For the sake of not cheating, I've changed the figures etc. I just need help on the approach. I can do similar questions on a horizontal plane, but I'm stuck now the acceleration isn't perpendicular to gravity. Edit: realized I gave the wrong description/ sketch for the angle I have
A person is being lifted up a slope with an incline from horizontal of 6 deg on a ski chairlift. The winch pulling the chairlift accelerates the chairlift up the slope, which results in the person and seat tilting back with an angle of 9 degrees from what would be perpendicular to motion. What is the acceleration of the winch? Treat the cable connecting the chairlift to the winch-cable as weightless, ie the person & chairlift act as a pendulum.