help finding angle

[smitheric420]

a cart on a (frictionless)inclined plane is attached to a load by a string that passes thru a frictionless pully. mass of cart =7.6 kg, mass of load = 4.2 kg, acc = 1.2 m/s^2. what is the angle of the plane?

[Pyrrhus]

What have you done?

Do a free body diagram

Use Newton's 2nd Law

\sum_{i=1}^{n} \vec{F}_{i} = m \vec{a}

[Diane_]

It's also worth noting that the masses will turn out to be irrelevant to the answer.