1
The amount of work done or expected to be done.
What is a load?
What is a Pulley?
A pully is a small wheel with a grooved rim that holds a rope, chain or cord.
Another name for a compound pulley?
Block and Tackle
What is a Mechanical Advantage?
A mechanical advantage is the amount of help you can get by using a simple machine
A natural power of effect that is able to change the speed or direction of something.
What is force?
Name the parts of a Pulley?
Wheel, Axle, Hook, Rope, Mounting Bracket
How many types of pulleys are there?
3
How can you determine the MA?
Count the lengths of rope that support the weight.
The energy used to do something to complete work.
What is effort?
Name the different types of Pulleys?
Fixed, Moveable and Compound
Describe a Fixed Pully?
It consists of one pulley attached to a permanent location. Fixed pulleys help lift a load by changing the direction that you apply the force.
What is the purpose of the clothesline system?
Make it more convenient to movie things closer and away from you.
To move something into or out of a particular position.
What is Work?
When you pull on the other end of the rope, the BLANK turns and the BLANK is moved or lifted?
Wheel, Load
Describe a moveable pulley?
Part of the load is supported by a fixed object and the other part is supported by a person. Moveable pulleys make it easier to lift a load by making it lighter to move
What is the purpose of the crane system?
To lift heavy objects. Reduce the amount of effort you put into pulling the rope.
Several pulleys being used together.
What is a Pully System?
What is the purpose of the wheel groove?
IT is down the centre to allow a rope to run through it without slipping out.
Describe a compound pully?
Combine both benefits of fixed and moveable. They change the direction of force as well as reduce effort needed to lift the load. They have one fixed and one moveable pulley.
What happens to the rope in a compound pulley system?
The rope is longer but the force required to lift is less.