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Early Motion Review
Question | Answer |
---|---|
motion | change in position |
frame of reference | set of parameters used to specify an object's position and motion |
scalar quantity | quantity that includes magnitude only |
vector quantity | quantity that included magnitude and direction |
negative acceleration | slow down in + direction OR speed up in - direction |
positive acceleration | speed up in + direction OR slow down in - direction |
zero acceleration | at rest OR constant velocity |
distance | total path of motion |
displacement | shortest path of motion between 2 points |
speed | distance/ time |
velocity | displacement/ time |
Pythagorean theorem | used to find magnitude of displacement in 90 degree motion |
TOA and tan^-1 | used to find direction/degrees of displacement in 90 degree motion |
speed up, slow down, or change direction | 3 ways to accelerate |
acceleration | change in velocity /time OR (vf - vi)/time |
physics | study of the nature and properties of matter and energy |
seconds | SI unit for time |
meters | SI unit for distance/length |
south and west | are considered "negative" directions |
north and east | are considered "positive" directions |
SI units for acceleration | m/s^2 |
UCM (Uniform Circular Motion) | constant speed in a circular path of motion |