Physics
Ch 4
–
Linear Motion Review
Terms

Relative motion

Instantaneous speed (velocity)

Frame of reference

Average speed (velocity)

Speed

Acceleration

Velocity

Free fall
Equations
⁄
Note: often you see this rearranged as:
And when an object starts from rest,
v
i
= 0
****
v
f
and
v
i
are instantaneous values NOT average values
When an object is in free fall, a = g = 10 m/s
2
downward.
Things You Should Be Able To Do

Explain how to tell
if an object is moving

Calculate
average
speed

Distinguish between speed and velocity

Calculate acceleration

Manipulate the linear motion equations to solve for any of the variables

Explain what it means to be in “free fall” and evaluate situations to det
ermine if an object is in
free fall

Describe the acceleration of an object in free fall

Describe and/or analyze how distance fallen per second changes for an object in free fall

Describe and/or analyze how the speed per second changes for an object in free
fall

Given a distance vs. time graph, describe the motion being represented…and vice

versa

Given a speed vs. time graph, describe the motion being represented…and vice versa

Interpret the
meaning of the slope of a distance vs. time graph and also for a sp
eed vs. time
graph

Explain the relationship between velocity and acceleration

Differentiate between instantaneous and average values for speed (or velocity)
*We have already completed several questions from the text, but certainly ALL the chapter 4 quest
ions
make for good review material.
**Don’t forget to review your Questions of the Day. They also make for great review material.
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