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MSniderStack Ch11CIA
Science Skills ch 11 Physical Science Conceptions in Action
Vocabulary Word | Definition |
---|---|
frame of reference | a system of objects that are not moving with respect to one another |
relative motion | movement in relation to the frame of reference |
distance | the length of a path between two points |
vector | a quantity that has magnitude and direction |
resultant vector | the vector sum of two or more vectors |
speed | the ratio of the distance an object moves to the amount of time the object moves |
average speed | the total distance traveled divided by the time it takes to travel that distance |
instantaneous speed | the rate an object is traveling at a given point in time |
velocity | the speed and direction an object is traveling |
acceleration | changes in speed, changes in direction, or changes in both. acceleration is a vector |
free fall | acceleration of an object toward Earth solely because of gravity |
constant acceleration | a steady change in speed |
linear graph | graph showing a straight line |
nonlinear graph | a curved line on a graph |