A lock inside of a doorknob is an example of this.
What is a wheel and axle?
100
A swinging hammer is a form of this kind of energy.
What is kinetic energy?
100
Examples of this simple machine are used to hold things together. It is made up of an inclined plane wrapped around a cylinder.
What is a screw?
200
This simple machine allows you to pull a flag up a flagpole.
What is the pulley?
200
Hammering a nail is an example of this.
What is a pushing force?
200
This is an example of a wedge.
What is a hammer, door stop, knife, or...?
200
Type of energy that is standing still.
What is potential energy?
200
This simple machine can be used to split things apart or hold a door open.
What is a wedge?
300
A tool with few or no moving parts that helps people do work.
What is a simple machine?
300
A force that works against motion
What is friction?
300
In tug-of-war one team is losing this can help them win.
What is more force?
300
A type of energy that is moving.
What is kinetic energy?
300
These simple machines are wheels with teeth on them that fit together when the simple machines are turned. These simple machines are used to increase or decrease turning
power by changing their size.
What is a gear?
400
Michelle is moving heavy boxes into a truck. She is using this simple machine to help her get the boxes into the truck.
What is an inclined plane?
400
When a pitcher throws the baseball to the batter and the ball starts to move to the ground as it travels, this force is pulling the ball down.
What is gravity?
400
A see-saw is an example of this.
What is a lever?
400
When chemicals react to each other or to some action.
What is chemical energy?
400
This simple machine can be used to lift a weight. It has a fulcrum, or pivot point, which can be located in the center, near the end or at the end of this simple machine.
What is a lever?
500
The only simple machine that doesn't move.
What is an inclined plane?
500
When an object stays in motion or at rest until a force acts upon it.
What is inertia?
500
The lid on a water bottle is an example of this.
What is a screw?
500
The sum of kinetic energy of an object and all the potential energy that can be used to do work.
What is mechanical energy?
500
A rope, a wheel with a groove in it and a weight make up this simple machine. You can pull down on the rope to lift the weight.