Terms
An object being moved or lifted is called a ______.
Load
the supporting point of a lever; also called a pivot.
Fulcrum
Fill in the Blanks. Gears are two or more wheels that have _________ on the rim and an _________ in the middle.
Teeth, axle
What is a wheel with a groove in the rim in which a rope or belt moves.
Pulley
a shaft or rod on which a wheel turns
Axle
What is in the middle of a class 1 lever?
Fulcrum
In a two gear system, when the driver is the larger gear, the smaller gear turns_____
Faster
A type of simple machine that is a cylinder, rolls, but does not have an axle.
Roller
The push or pull of an object is called
Force
What is in the middle of a class 2 lever?
Load
In a gear system, if the first gear is turning clockwise what way is the second gear turning?
Counterclockwise
What is a similarity between a wheel and axle and a roller?
Round, moves by rolling, used to move things more easily, used to transport items, reduces friction
A force that resists motion when the surface of two objects are in contact
Friction
What is in the middle of a class 3 lever?
effort
A system where there are two or more gears is called a ______.
Gear train
True or false: A pulley system with less pulleys requires less effort/force to move a load
False
Example of a drive system
Wheel to wheel contact, belt or elastic, chain, cogs or gears.
An example of a class 2 lever.
wheelbarrow, nutcracker, etc.
Another name for a pulley sytem
Compound pulley
What type of pulley is attached to the load and the load moves in the same direction that the force is applied?
Moveable pulley