| A | B |
|---|
| Potential energy | Energy that is stored in an object. |
| Kinetic energy | Energy an object posses when in motion. |
| Ballista | Type of catapult that looks like a crossbow and uses twisted rope as the source of energy. |
| Trebuchet | Type of catapult that has a counterweight as the source of energy. |
| Mangonel | Type of catapult that has a launch arm and a crossbar to release the payload. |
| Calibrate | ensure the accuracy of something through testing and making necessary adjustments. |
| Energy transfer | Transfer of energy from one object to another. |
| Force | Capacity to do work or cause physical change. |
| Gravity | Force of attraction by which things tend to fall toward the earth. |
| Inertia | Property of matter--object as rest stays at rest unless acted on by another force. |
| Mass | The amount of matter in an object. |
| Motion | The act or process of moving or of changing place or position. |
| Projectile | A fired, thrown, or otherwise propelled object. |
| Tension | A force that acts to expand or lengthen what it is acting on. |
| Torsion | Rotating or twisting force. |
| Velocity | Speed and direction of an object's motion. |
| Weight | Amount of force due to gravity. |
| 45 | Angle at which catapult should launch an object the farthest distance. |
| Fulcrum | Point where the arm pivots |
| Catapult | A device in which accumulated tension is suddenly released to hurl an object some distance. |
| Items that contain elastic potential energy | Rubber bands, sponges, bungee cords |
