| A | B |
|---|
| frame of reference | the background or object used to compare 2 things which are moving |
| motion | a change in the position in a certain amount of time |
| acceleration | a change in velocity( speeding up or changing direction |
| velocity | speed in a given direction ( east, north, down, up) |
| speed | the rate at which an object moves |
| momentum | the effort it takes to stop something from moving |
| velocity | A jet is flying at a speed of 7200 km in an eastern direction |
| acceleration | A roller coaster is going up a hill at 10 MPH, then zooms back down at 50 MPH |
| speed | A cheetah chasing a zebra at 110 MPH |
| frame of reference | One person on the escalator at the mall, another on the steps: the person on the escalator appears to be going backwards |
| motion | A gust of wind blows over a garbage can |
| momentum | Two baseball players are running for the same fly balland collide. The smaller of the 2 players falls back 3 feet. |
| acceleration | A wolf is chasing a rabbitat 20 MPH northward, then follows it as it runs east. |
| frame of reference | A dolphin is swimming alongside a slow-moving yachtand passes it, and the yacht appears to be moving backward |
| velocity | A rocket is blasting off into space at 45,677 km/hr/north |
| momentum | A pool player hits one cur ball into the other balls, sending them hurling around the table. |
| speed and mass | 2 things which affect momentum |
| acceleration | final speed minus original speed over time |
| speed | distance/time |
| velocity | distance/ time + direction |
| physics | the study of motion |
| speed and mass | 2 factors which affect velocity |
