| A | B |
|---|
| Pulley | A wheel with a groove around its middle. A rope and wheel together make up this system. |
| Incline Plane | A ramp. Helps us to move from a low place to a high place. Allow us to lift an object in small increments. |
| Screw | Used to hold things together. Can hold wood or metal together. |
| Wheel & Axle | A set of two things that work together to form a machine. |
| Wedge | Two inclined planes stuck together. Used to push things apart. |
| Lever | Used to move heavy objects. |
| Gear | A wheel with teeth on the outside |
| Simple machine | Machine that has few or no moving parts |
| Machine | Makes work easier, solve human problems. |
| Work | Is moving an object over a distance |
| Inertia | An object's resistance to change in motion |
| Momentum | Mass that is in motion |
| Friction | Acts in the oppostie direction of the objects motion. Rubbing causes this. |
| Air resistance | Drag, the force of sir pushing against the motion of an object |
| Gravational force | The attraction one object has for other objects. |
| Energy | The ability to do work |
| Mass | How much matter an object contains |
| Direction | the direction in which the force is applied determines the direction of motion. |
| Unbalanced force | Forces can cause an object to start moving, stop moving or change direction. |
| Balanced force | Causes an object to remain in place |
| Force | a push or pull on an object |
| Motion | an object changing its position over time |
