Two particles $C$ of mass 3 kg and $D$ of mass 5 kg are connected by a light inextensible string. The string passes over a smooth pulley fixed at the top of a rough inclined plane. The plane is inclined at an angle of $35^{\circ }$ to the horizontal. $C$ lies at rest on the plane and $D$ hangs freely from the edge of the plane with the string taut. Particle $C$ is released from rest and accelerates up the plane at 2 ms^-2.