Recent content by rafaamcarvalho

Oh got it, did not check if it was perpendicular, so the therm should be m⋅g⋅cosθ⋅r? And then my final formula would be, (m⋅r² + ½⋅m⋅r²)α + (k⋅r²)⋅θ - (m⋅g⋅cosθ⋅r) = 0 ?

I believe so. But if its not m⋅g⋅r, what could it be? You are right, the spring wraps around the disc, so is the displacement x = r⋅θ? And how to calcule the polar moment of inertia J of a disc with mass m with a concentrated mass m in point A?

Hello to all, first sorry about any mistakes because English is not my native language. I'm trying to solve this problem and I can't seem to find the equation of motion Homework Statement The disc and the point A both have mass m; θ(0) = 0 2. The attempt at a solution I tried to use the...