Apulley system has a mechanical advantage of 10.
a. if a mover used this pulley to lift a piano with a force of 1450 n a distance of 4 m, how much force must the mover use?
b. how far will eh mover pull the rope?
c. how many ropes support the piano?

(a) 145 N

(B) 40 N

(c) 10 ropes

Explanation:

Mechanical advantage, where and are input and output force respectively

Since MA is given as 10 and input force is 1450 N

Therefore, the mover must use a force of 145 N

(b)

Since also and the is given as 4 m then

(c)

Literally, we need 10 rope segments to support the piano since we utilize the mechanical advantage

12000j is work done