The slotted arm OB rotates in a horizontal plane about point O of the fixed circular cam...

The slotted arm OB rotates in a horizontal plane about point O of the fixed circular cam with constant angular velocity The spring has a stiffness of 5 kN/m and is uncompressed when The smooth roller A has a mass of 0.5 kg. Determine the normal force N which the cam exerts on A and also the force R exerted on A by the sides of the slot when All surfaces are smooth. Neglect the small diameter of the roller.