History of the Lever Theory of Operation Classes of Levers Examples of Levers Other
What is... 1500 B.C.
One of the first recorded uses of the lever was in ___________
What is... Theory of Operation
The formula for correctly using the lever is called the __________________________.
What is... third
In the ________ class lever, the force you have to use is greater than the load that is there, but the effort is a shorter distance than the loadâ€™s distance.
What is... hand brakes
One example of a first class lever is bicycle ________________
What is... 100 tons
Some of the objects lifted in ancient times weighed over ______________
What is... steelyard
The Greek device, the _____________, improved on these levers by adding a sliding weight to the other side to enhance the precision.
What is... opposite
If the weight is one meter from the fulcrum, you have to apply force two meters from the fulcrum in the ____________ direction.
What is... first
The __________ class lever is when the fulcrum is somewhere in between the load, or object, and the effort, or applied force.
What is... canoe
One example of a second class lever is a _______ paddle
What is... less
The lever allows the person using it to use _____ force to move an object
Who is... Archimedes
The earliest recording of the lever being used was in the third century B.C. and these were provided by __________________.
What is... right next to or close to
To maximize the applied effort people found that placing the fulcrum ____________________ the load was more efficient than any other position on the lever.
What is... second
In the _________ class lever, the fulcrum is totally to one side, the load is in the middle, and the effort is on the other side.
What is... fishing
One example of a third class lever is a _______ rod
Who is... Kyle, Josh, and Sarai
Who made this powerpoint?
What is... to raise
The word lever, comes from the French, meaning ______________.
What is... twice
To correctly lift what you want to, you have to apply force ___________ the distance between the weight and the fulcrum.
What is... first
The most common type of lever used is the ________ class lever
What is... diving
One example of a second class lever is a _________ board
What is... second
The stapler is a ________ class lever
What is... excavation, cultivation, and for moving large objects
Levers have been used since ancient times for _________________, _____________, and ___________________.
What is... fulcrum, load, and effort
A lever is a simple machine, but can be difficult to use if you do not know the correct positions for the
____________, ______________, and __________________
What is... third
The _______ class lever is the most common lever in the human body
What is... arm
One example of a third class lever is a human __________