Pulley
Screw
Wheel/Axle
Lever/wedge
Inclined Plane
100
wells,flag poles,window blinds,rock climber pulleys
What are example of a pulley?
100
A screw is an inclined plane wrapped around a shaft or cylinder
What is a screw?
100
It was First used around 3000 B.C. and is one of the most important invention in history.
When was the Wheel/Axle first used?
100
A wedge is two inclined planes joined back to back.
What is a wedge?
100
An inclined plane is a flat surface that is higher on one end.
What is an inclined plane?
200
A pulley is a Wheel/Axle with a grove around the outside.
What is a pulley?
200
The body and The thread
What are the two parts of a screw?
200
It is connected to a rigid pole.
What is the Wheel/Axle connected to?
200
in a first class lever the fulcrum is in the middle and the load and effort is on either side.
What is in a first class lever?
200
Slide,roof,ramp,skating ramp
What are some examples of an inclined plane?
300
It needs a rope chain or belt around the groove to make it work.
What does a pulley need?
300
It is used to lift heavy objects
What is a jackscrew used for?
300
They were the forerunner the wheel,several logs placed under heavy objects.
What were rollers?
300
It is a ridged bar that is free to turn about a fixed point called the fulcrum
What is a lever
300
at one end
where is surface raised at
400
They work by puling the rope and adding a lever with make the effort decrease.
How do Pulleys work?
400
They are a screw to fastened things
What are drill bits
400
It is applied to a large wheel to turn the smaller Axle
Where is the effort force applied to?
400
it can be one sloping surface
What can a wedge be?
400
it provides less effort
What does an inclined plane provide
500
A fixed pulley acts as a First Class Lever with the fulcrum located at its axis,instead of a bar the pulley uses a rope.
What does a pulley act like when its fixed?
500
they form ramps
What do threads form
500
Door knobs,screwdrivers,water faucets,handle bars on a bike
What are examples of wheel/axles?
500
it becomes either a knife or an ax blade
What does a wedge become
500
increases the elevation
What doe sit do
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