AP Physics Unit 1

Velocity

How quickly the position changes

Speed

How quickly is the distance traveled

Instantaneous Speed

Speed at particular moment in time

Displacement

Change in position

Free Fall

When an object is acted upon by only gravity (a is always the same)

A=

-9.8 m/s²

G=

9.8 m/s²

Slope=Velocity

Pos vs. Time Graph

Position=Read It

Position vs. Time Graph

Only type of graph that curves

Position vs. Time Graph

Slope=Acceleration

Velocity vs. Time Graph

Displacement=Area under curve

Velocity vs. Time Graph

Velocity=Read it

Velocity vs. Time Graph

Always straight lines

Velocity vs. Time Graphs

Positive Velocity

Above x-axis (v vs t)

Negative Velocity

Below x-axis (v vs t)

Slowing Down

Going toward x-axis (v vs t)

Speeding up

Away from x-axis (v vs t)

Area Formula

(L)(w)+1/2(b)(h)

Acceleration=read it

Acceleration vs. time graph

Change in velocity=area under curve

Acceleration vs. time graph

Always horizontal lines

Acceleration vs. time graphs

Instantaneous velocity on a graph means…

tangent line

velocity=

Δx / Δt

acceleration=

Δv / Δt

kinematic #1

v = v₀ + at

kinematic #2

Δx = v₀t + ½at²

kinematic #3

v² = v₀² + 2aΔx