Physics Ch1 of The Physics of Everyday Phenomena
Terms
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- Avg speed
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Rate at which distance is covered over time
How fast you are going, not where - Instanteous Speed
- How fats one is going at a given instant (choose very small interval)
- Velocity
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Direction of motion and how fast
Has magnitude (size-fast) and direction - Vector
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A quantity that has both magnitude and direction
Length of arrow=vector quantity
arrow=direction - Vector Quantity
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Any quantity for which both size and direction are needed for a complete description
IE:velocity, acceleration, force, moment - Instanteous Velocity
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Vector Quantity.
Size equal to instanteous speed and the direction that corresponds to the object's motion - Acceleration
- The rate at which velocity changes
- Avg. Acceleration
- Change in velocity over the time to make that change
- Instanteous accelration
- Rate at which velocity is changing at a given instant of time
- Uniform Accelratijon
- Acceleration that does not change as motion proceeds
- Slope of a PvT graph
- Velocity
- Slope of a VvT graph
- Acceleration
- Slope of a Unifrom Acceleration Graph
- Horizontal Line
- Slope of a Distance v Time curve
- Instanteous/velocity
- Slope of DvT:Large upward slope:
- Large instanteous velocity
- Slope of DvT=constant
- velcoity=constant
- Steep slope of VvT=
- Rapid change in V, large acceleration
- Horizontal line for slope of VvT
- Zero Acceleration
- Uniform Acceleration in a VvT
- Constant slope (upward if positive, vice versa)
- Area under an Acceleration v T
- Change in Velocity
- Area aunder a VvT graph
- Change in posititon/distance traveled?
- Eqn for Avg Speed
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Distance traveld/time of travel
s=d/t - Eqn for avg. Acceleration
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Change in V/elapsed time
a=change in v/t - Eqn for distance
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Velocity times time(with constant v)
x=vt - Getting V from a Uniform Acceleration Grpah
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V at any time=original v +velcoity fained.
Velocity is gained b/c of acceleration
Change in V=at
V=Vo+at - Finding D in V graph with nonconstant V and initial v=0
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x=(.5)at^2
t goe sin twice to find avg v and to find distance - Avg velocity (if start is 0)
- 1/2 final v
- final V
- at
- Finding D in V graph with motion before acceleration
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D=VoT+(.5)at^2
same equation just accounts for intial velocity times time (distance it moves with contant v)
sum of rectange and trainfe - finding a in an AvT graph
- A=constnat
- Avg V
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Total change in psotition/elapsed time
delta x (with vector)/delta t - Finding position from a velocity v time graph
- x=(.5)AT^2+VoT+Xo