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25 Cards in this Set
- Front
- Back
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frame of reference |
system of objects that are not moving with respect to one another |
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relative motion |
movement in relation to a frame of reference |
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distance |
is graphed as responding variable |
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displacement |
the direction and from the starting point and the length of a straight line from the starting point to the ending point (how far you are from starting point) |
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vector |
a quantity that has magnitude and direction |
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resultant vector |
points directly from the starting point to the ending point |
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speed |
ratio of the distance a object moves to the amount of time and object moves |
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average speed |
the total distance traveled divided by the time it takes to travel that distance |
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instantaneous speed |
is the rate at which an object is moving at a given moment in time |
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velocity |
a description of both speed and direction of motion |
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acceleration |
the rate at which velocity changes |
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free fall |
the movement of an object toward Earth solely because of gravity |
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constant velocity |
like being on cruise control so speed doesn't change |
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linear graph |
constant acceleration is represented by straight line |
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nonlinear graph |
a curve connects the data points that are plotted |
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when can speed be positive? |
north and east |
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when can speed be negative? |
south and west |
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what is vector addition? |
displacements being added
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what does the slope of a speed-time graph tell? |
acceleration |
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when can acceleration be positive? |
speeding up |
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when do vectors add? |
displacements in the same direction
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when can acceleration be negative? |
slowing down |
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what does the slope of a distance-time graph tell you? |
velocity
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when can acceleration change? |
going around a curve
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when do vectors subtract? |
displacements going is opposite direction |
