| A | B |
|---|
| Motion | The act or process of traveling in a specified direction |
| Speed | Distance an object travels in a certain amount of time. |
| Velocity | Speed in a direction |
| Acceleration | Speeding up, slowing down or changing direction |
| Force | A push or a pull exerted on an object |
| Newton | A unit of measure that equals the force required to accelerate one kilogram of mass at 1 meter per second per second |
| Net Force | The overall force on an object when all the forces acting on an object are added together |
| Friction | The force that one surface exerts on another when the two rub against each other |
| Gravity | The force that pulls objects toward each other |
| Weight | The force of gravity on the mass of an object gives it this |
| Mass | The amount of matter in an object |
| Terminal Velocity | When air resistance balances out weight of a falling object, it will fall at this constant velocity |
| Free Fall | The motion of a falling object when the only force acting on it is gravity |
| Projectile Motion | The curved path an object follows when thrown or propelled near the surface of the Earth. |
| Intertia | The tendency of an object to resist any change in its motion |
| Momentum | The product of an object's mass and velocity |
| Pressure | A force on a unit area |
| Pascal’s Principle | States that when force is applied to a fluid container, pressure increases all through the fluid |
| Buoyant Force | The upward force that keeps an object immersed in or floating in a liquid |
| Archimedes' Principle | The physical law that states that an object is pushed upward by a force equal to the weight of fluid it displaces |
| Bernoulli's Principle | The faster a fluid moves, the less pressure the fluid exerts |
| Lift | This is the upward force exerted on an airplane wing |
| Thrust | A sudden strong movement in which you push something forward |
| Drag | The force that acts opposite to the direction of motion. |
| Work | the use of a force- a push or a pull- to move an object in the same direction as the force |
| Power | Rate at which work is done. |
| Mechanical Advantage | Work made easier by using a simple machine |
| Lever | A bar that pivots, or turns, on a fixed point |
| Inclined plane | A flat, slanted surface, or ramp |
| Wedge | Two inclined planes placed back to back |
| Screw | A simple machine that is an inclined plane wrapped around a column |
| Wheel and Axle | A simple machine that is a disc or ring (The wheel) attached to a rod (the axle) so that both turn together |
| Pulley | A wheel with a rope, cord, or chain around it |
| Compound Machine | A machine made up of two or more simple machines |
