Machines
A ______ is a push or pull that makes an object move.
force
The _____ is the item that must be moved.
load
An example of a lever is a _____.
scissors
**Check test and it is number pic 1
A _____ is an inclined plane wrapped around a cyclinder.
screw
There are _____ simple machines in all.
6
There are ____ classes of levers.
3
Which is a special type of wheel and axle?
Gear
Draw a picture of a wedge
Test pic #5
Friction exists between two _____ obects.
moving
A _____ is made of a rope, belt, or chain that is wrapped around a grooved wheel.
pulley
There are two types of pulleys: fixed and ______.
Moveable
An example of a wedge includes____.
Draw a picture of a screw
Test pic #4
Machines are more efficient when there is _____ friction because a certain amount of work is lost due to friction--work becomes heat.
*think of car engine
less
A _____ is a slanted surface that connects a high area to a low area.
inclined plane
An inclined plane helps you do work by ______ the amount of force required to move a load.
decreasing
____ is done when you push or pull on something and it moves in the direction of the force.
Work
Draw a picture of a wheel and axle
Test pic #3
What is an example of a 1st class lever?
Scissors
A ____ is an inclined plane with a sharp point.
Although it is less force to move an object when using a screw you have to travel greater _____.
distances
What is an example of friction?
Answers can vary--two objects rubbing against each other
Draw a picture of an inclined plane
Test pic #6
Draw a picture of a pulley and tell me one place you would find a pulley at.
Test pic #2--flag pole