Newton's Laws
The force that pulls everything toward the center of the earth.
Gravity
A measure of how far something moves over a period of time.
Speed
A simple machine that has an arm that moves about a fixed point, example teeter-totter
Lever
The force that works against effort
Resistance force
The change in velocity during a period of time, when an object speeds up, slows down, or changes direction
Acceleration
First Law of motion states...
An object at rest tends to stay at rest. An object in motion tends to stay in motion
A fixed unmoving object or location to determine if another object has changed position
Reference Point
The part of a lever on which a person or another machine applies a force.
The effort arm
The decrease in effort that is needed to move an object
Mechanical advantage
The force that resists the movement of objects against each other
Friction
2nd Law of Motion...
Force is equal to an object's mass and the acceleration of the object
Force = Mass x Acceleration
The speed of an object in a particular direction.
Velocity
A inclined plane wound around a cylinder or cone
Screw
A device made of two or more simple machines.
Compound machine
The type of energy to make something move
Mechanical
The tendency of an object to resist a change in its motion.
Inertia
A push or a pull applied to an object
Force
A simple machine that has a central pivot around which a wheel moves, example turbine, doorknob
Wheel and axle
The mass and velocity (speed and direction) of an object determine what?
Momentum
Force times distance is equal to this.
Work
Third Law of motion...
For every action there is an equal and opposite reaction
The Law of action and reaction.
The metric unit for forces including weight.
A Newton
The part of a lever that applies a force on an object.
The resistance arm
The spot where the bar of a lever turns or pivots
Fulcrum
The unit for work.
Joule