pulleys

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

a pulley system consists of

• rope
• cable
• chain
• all of the obove

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

a pulley system can

• have infinite pulleys
• have zero pulleys
• pull buildings out of the ground
• be classified as a screw

how would a pulley be used in every day life?

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

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

What two parts might make a pulley?

• wheel and axle
• wheel and wire
• wheel and screw
• wheel and fulcrum