| A | B |
|---|
| Speed | Measure of how fast an object moves. |
| Friction | Force that acts against motion when two surfaces are touching. |
| Incline plane | Simple machine made of a flat surface that is higher at one end than the other. |
| Inertia | Objects will keep moving unless a force acts on them;Objects that are not moving will remain still unless an unbalanced force acts on them. |
| Motion | The process of changing position or place. |
| Fulcrum | Point a lever turn on. |
| Work | What is done when a force moves an object. |
| Newton | Unit used to measure pushes and pulls. |
| Gravity | The force that keeps you from floating into space. |
| Friction | occurs between a bicycle wheel and the road because the wheel and the road touch. |
| Tug of war | One side wins because the force pulling on one side was greater that the force pulling in the opposite direction on the other side. |
| Force needed to move a heavy box | is less that the force needed to lift the box straight up. |
| Ramp | A simple machine made up of two inclined planes placed back to back. |
| See Saw | Example of a lever is a.... |
| Pulley | type of wheel with a rope or string around it. Can be used to lift loads more easily. |
| Screw | holds things together and can be used for lifting. |
| Wedge | helps us cut or split things. |
| Lever | helps us move things with less force. |
| Wheel | can be used to move things more easily from one place to another. |
| How does an inclined plane make it easier for a person to lift a very heavy box into a truck? | It takes less energy to move the box at an incline than to lift it straight up. |
