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Chapter 2: Motion in One Dimension
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A system for specifying the precise location of objects in space and time
Frame of reference
Is motion that only occurs along one axis (x or y)
Things going left or right
Things going up or down
Motion in One Dimension
Δx
change in position
The change in position of an object
Displacement
The total amount of space traveled along any path
Distance
Where an object starts and stops isn’t enough to describe?
Motion
The total displacement divided by the time interval during which the displacement occurred
Average velocity
v avg= Δx/Δt
Average velocity
If an object travels 50 meters in 10 seconds, what is its velocity?
5m/s
describes motion with both a direction and a numerical value
Velocity
Has no direction, only magnitude
Speed
Total Distance/Total Time = ?
Average Speed
A runner travels 200 meters in 40 seconds. What is the average speed?
5m/s
The rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
Acceleration
what can either increase or decrease
Velocity
Δt / Δv
Average Acceleration
In a velocity vs. time graph, the what is the change in velocity ?
Rise
In a velocity vs. time graph, what represents time ?
Run
In a velocity vs. time graph, what represents slope ?
acceleration
Δx = ½ ( Vi + Vf ) ΔT
Displacment