## Glossary of Physics Ch1 of The Physics of Everyday Phenomena

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- Avg speed
- 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
- Direction of motion and how fast

Has magnitude (size-fast) and direction

- Vector
- A quantity that has both magnitude and direction

Length of arrow=vector quantity

arrow=direction

- Vector Quantity
- Any quantity for which both size and direction are needed for a complete description

IE:velocity, acceleration, force, moment

- Instanteous Velocity
- 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
- Distance traveld/time of travel

s=d/t

- Eqn for avg. Acceleration
- Change in V/elapsed time

a=change in v/t

- Eqn for distance
- Velocity times time(with constant v)

x=vt

- Getting V from a Uniform Acceleration Grpah
- 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
- 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
- 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
- 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