Ch 4 Linear Motion Review

testybelchMechanics

Nov 14, 2013 (3 years and 7 months ago)

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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.