2. A box having a weight of 8 lb is moving around in

a circle of radius A-2 ft with a speed of (UA)₁ - 5 ft/s

while connected to the end of a rope. If the rope is pulled

inward with a constant speed of u, 4 ft/s, determine the

speed of the box at the instant r= 1 ft. How much work

is done after pulling in the rope from A to B? Neglect

friction and the size of the box.