Simple Machines
A round object that turns around a central point
Wheel
Any device made up of more than one simple machine
Complex machine
This type of simple machine allows the lid to stay on a bottle.
Screw
The strength or energy that moves an object
The point around which a lever pivots or turns
Fulcrum
A simple machine with one narrow or pointed end and one wide end, used to separate two objects or parts
Wedge
A very large complex machine used to push or move large amounts of earth
Earthmover
This type of simple machine is found on a wagon.
Wheel and axle
The force that builds up when two objects rub against each other.
Friction
A pulley usually involves a wheel and ___________________, used to pull it
Rope
An inclined plane wrapped around a rod, often used to hold things together
Screw
A large complex machine that removes dirt from the ground, or digs
Excavator
This type of simple machine can be found on an axe.
Wedge
The act of moving something.
Work
A sloped path used to move things between a lower level and a higher level
Ramp
A circular lever, usually a wheel with a rope around it
Pulley
Name one simple machine on a can opener
Wedge, lever, wheel and axel, gears
This type of simple machine is what makes a ramp work.
Inclined plane
__________________ forces happen when one object directly touches another object.
Contact
An upward or downward slant
Slope
Any basic device that works with the use of a single force
Simple machine
A machine that performs tasks for people on its own
Robot
This type of simple machine is what allows bikes to change speeds.
Gravity is an example of this kind of force
Non-contact
A gear is a wheel and axle with __________________
Teeth