Question

Let's say you were using a single-pulley system to lift a flag up a flagpole. If you wanted to raise the flag 10 meters into the air, how far would you have to move the rope?

a. 5 meters
b. 10 meters
c. 20 meters
d. 50 meters

Answer 1

b. 10 meters

Step-by-step explanation:

In a single pulley , which is a lever , velocity ratio is one . In other words , velocity of load is equal to velocity of effort . The load shifts by the same distance as the force or effort moves . The only advantage of this pulley is that direction of force is reversed .

Hence to raise a flag by 10 m , rope would have to move by 10 m .