Two problems on rigid body dynamics

(Please refer attachment for detailed problem description) Problem 1 : The 40 kg disc is released from rest with the spring compressed. At the instant shown (see attachment) it has a speed of 4 m/s and the spring is unstretched. From this poinr determine the distance d that the disc moves down the 30 degree ramp before momentarily stopping. The disc rolls without slipping. Determine : a) The distance d in meters down the ramp from point A. b) The moment of inertia of the disc about G in kgm^2 c) The angular velocity of the disc in rad/sec at this instant. d) The work done by the spring in Nm during the downward motion. e) The distance h in m, up the ramp from A to the starting... click for more

Rigid body dynamics: Pulley and blocks, Angular acceleration of a plate.

I need a lot of help with these problems. Thanks

Problem solving

see attachment