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Lever, wedge, wheel and axle, inclined plane, or screw
Levers
100

A measure of the distance an object moves in a given amount of time

what is speed?
100

The rate of change in velocity over a period of time

What is acceleration?

100
A device that makes work easier and which has few or no moving parts.
What is a simple machine?
100

Crowbar, wheelbarrow, seesaw

What is a lever?

100
The class of levers that has the fulcrum in the middle

What is a first-class lever?

200

The force applied to a machine

what is effort?

200

The ability to do work.

What is energy?

200

An object that resists the force applied by a machine.

What is a load?

200

Ax or knife

What is a wedge?

200
Scissors, oars, see-saw.
What is a 1st class lever?
300

The pivot point of a lever

What is fulcrum?

300
A straight, slanted surface used to raise an object.
What is an inclined plane?
300

A measure of the steepness of a slope.

What is grade?

300

Twist-off bottle cap

What is a screw?

300
Can opener, nail clippers, and nutcrackers.
What are 2nd class levers?
400

The combination of an object's speed and direction 

What is velocity?

400

A beam or bar that rotates around a fulcrum

What is a lever?

400
A metric unit used to measure force.
What is a newton?
400

Ramp

What is an inclined plane?

400

The class of levers that has the effort in the middle

What is a third-class lever?

500

To do more work, what must increase?

What is force?

500
The result of a force applied to an object causing it to move.
What is work?
500
A metric unit used to measure work, equal to one newton meter.
What is a joule?
500

Gears

What is a wheel and axle?

500
A hockey stick, a broom, a shovel.
What are 3rd class levers?