| A | B |
|---|
| acceleration | the rate at which the velocity of an object changes over time |
| equilibrium | a state in which all forces acting onan object are in balance |
| inertia | the tendency of an object to resist any motion |
| the X axis | horizontal axis |
| the Y axis | vertical axis |
| average speed | how far an object moves in a certain amount of time |
| velocity | the speed anddirection of an object's motion |
| force | a push or a pull that acts on an object |
| power | the rate at which work is done |
| work | the energy used when a force moves an object |
| newtons | the magnitude of a force is measured in this |
| an object's weight | the amount of gravitational force between it and Earth |
| Electrons when rubbed together | move from one object to another |
| Friction | slows down the motion of an object |
| Newton's First Law of Motion | An object at rest stays at rest until a net force acts on it |
| Air friction | force that is present when air flows over a surface |
| magnitude of a force | How strong the force is |
| magnetism | a force that pushes and pulls on other objects |
| Electric force | acts between objects that are electronically charged |
| joules | work is measured in this unit |
