Suppose you weigh 760 N (about 170 lbs) but would find it hard to lift an object weighing 500 N (about 115 lbs). Consider how you could use this simple machine toraise the object, and what force you would have to exert to do it.
(a) With the pulley hooked to the ceiling, you could pull the rope down on the rope, as if pulling yourself up along the rope. To raise the object tied to the end ofthe rope you would need to exert a force of _____ N downward.
(b) With the pulley attached to the object and one end of the rope attached to the ceiling, you could lift the object by pulling with a force of ______ N directlyupward on your end of the rope.