Rotation of bar OA is controlled by the lead screw which imparts a horizontal velocity v to

Question:

Rotation of bar OA is controlled by the lead screw which imparts a horizontal velocity v to collar C and causes pin P to travel along the smooth slot. Determine the values of r˙ and θ˙, where r = OP, if h = 160 mm, x = 120 mm, and v = 25 mm/s at the instant represented.