The load in Fig. 4-7 is hanging at rest. Take the ropes to all be vertical and the pulleys to be weightless and frictionless. 

(a) How many segments of rope support the combination of the lower pulley and load? 

(b) What is the downward force on the lowest pulley (the “floating” one)? 

(c) What must be the total upward force exerted on the floating pulley by the two lengths of rope? 

(d) What is the upward force exerted on the floating pulley by each length of rope supporting it? 

(e) What is the tension in the rope wound around the two pulleys? 

(f) How much force is the man exerting? 

(g) What is the net downward force acting on the uppermost pulley? 

(h) How much force acts downward on the hook in the ceiling?

Transcribed Image Text:

200 N Fig. 4-7