Mechanical Advantage Of A Pulley

Mechanical advantage is a measure of how much a machine multiplies the input

• efficiency.
• force.
• power.
• work.

What is the mechanical advantage of the block and tackle used to lift the bale of cotton?

• 1
• 2
• 3
• 4

This pulley

• has a mechanical advantage of 1 and does not make work easier.
• has mechanical advantage of 2 and reduces the force needed to lift an object.
• has a mechanical advantage of 2 and changes the direction of the applied force.
• has a mechanical advantage of 1 and changes the direction of the force needed to lift an object.

How does a single fixed puled, like the one seen here, help you do work?

• changes the direction of the force
• increases the amount of applied force
• decreases the amount of applied force
• allows you to pull the rope a shorter distance

What is the mechanical advantage of this pulley system?

• 2
• 3
• 4
• 5

a pulley is a wheel and axle or shaft that supports movement or change of direction.

• true
• false

a movable pulley

• has  more force required than the load 
• is a block and tackle
• can move freely up and down
• consists only of rope

what type of pulleys are in boats?

• compound
• movable
• fixed
• block and tackle

True or False? pulley systems can have one to three ropes on one system

• false
• true

how would a pulley be used in every day life?

• in construction
• in a scooter
• mobile transport 
• all of the obove