Q. A 92 kg climber rappels down a rope applying friction with figure eight (piece of climbing equipment ) to reduce his his downward acceleration. The rope which is damaged can withstand a tension of 675 N. Can the the climber limit his descent to constant speed without breaking the rope? If not to what value can he limit his downward acceleration?

Q. Water (η = 1.00 10-3 Pa·s) is flowing through a horizontal pipe with a volume flow rate of 0.050 m3/s. As the drawing shows, there are two vertical tubes that project from the pipe. From the data find the radius of the horizontal pipe.