I asked a question concerning this a while ago, but now it's a little different...

A student gets a cart that does not suffer drag. Now, though, the track is not leveled.

How can I calculate the angle?

The cart is on an inclined plane, then there is a pully, and a load. So the angle trying to be found is the inclination of the plane which the cart is on with the.

The knowns are:
cart 7.6kg
load 4.2kg
acc 1.2kg

I know I have to use components... but I just don't know how to incorporate them with Newton's II Law.