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Physics Chapter 2
| Question | Answer |
|---|---|
| Scalar | a quantity that is described by magnitude only |
| force | a push or pull |
| net force | more than a single acting on an object |
| vector | a quantity that is described with arrows that mean direction and magnitude |
| vectored quantity | any quantity that requires both magnitude and direction for a complete description |
| resultant | sum of two or more vectors |
| equilibrium | when all forces add to zero |
| law of intertia | every object continues in a states of rest or a constant speed in a straight line unless acted on by a non-zero net force\. |
| Aristotle thought....... | objects should fall at speeds proportional to their weight and that an object needed a force to keep moving |
| Galileo thought.... | objects fall at same rate despite the weight of the object and an object already moving forward would not need another force to keep moving forward (unless changing direction) |
| Copernicus was the first to.... | write down mathematical equations to prove how the earth and the other planets were moving. |
| Newton..... | refined galileo's idea and made it his first law of motion (law of intertia) |
Created by:
Madelyn Gaudreau