Vocabulary
A push, pull, or twist on an object that causes it to move.
What is force?
This simple machine has a load, effort, and fulcrum
What is a lever?
Which simple machine has a fulcrum as the balance point?
What is a lever?
Screw
What type of simple machine is a teeter-totter?
Lever
A special type of wheel and axle with teeth.
Gears
Which simple machine has a grooved wheel with a rope or a chain that goes around the wheel?
What is a pulley?
True or False
When you make a load easier to lift, the trade off is that you can't lift it as a high.
True
True or False
When you use an inclined plane to move a load, it is harder to lift a load.
False
What type of simple machine is an ax?
Wedge
A machine with few or no moving parts that makes work easier.
Simple machine
Which simple machine has a slope that has one end higher than another?
What is an inclined plane?
This class lever has the load in the middle.
What is a second class lever?
If one gear is turning clockwise, the other will turn __________________.
Counter-clockwise
What type of simple machine is a slide?
Inclined plane
The rubbing of one object against another causes this.
What is friction?
A circular object rotating on a rod
What is a wheel and axle?
This lever has the force in the middle.
Third class lever
Wheels and axles reduce ___________.
friction
What type of simple machine is a jar lid?
Screw
These machines have 2 or more simple machines.
What is a compound or complex machine?
Which simple machine has two inclined planes joined together to cut or split things apart?
What is a wedge?
This class lever has the fulcrum in the middle.
What is a 1st class lever?
True of False When you use a pulley system, the load is easier to lift, but you have to pull a lot of string to lift it.
True
What type of simple machine is a flagpole, zipline, or crane?
Pulley