**FYI:** This is a sample of concepts in chapter 2. You need to take your own textbook notes
(due on 9/24/01) but I hit a few highlights here. This is the format you should use!

Further,
your notes will encompass both chapters 2 and 3 since A. Kinematics covers both
chapters.

__VOCABULARY:__

**-Mechanics:** The study of motion and what produces and affects motion (p. 33)

-**Kinematics:** A subsection of *mechanics*
which deals only with describing motion (ex. Acceleration, velocity…etc)

-**Dynamics:** A subsection of *mechanics*
which deals with the causes of motion (ex. Force, friction, work, energy,
power, momentum)

-**Distance:** The length of an entire path from start to finish.

-**Displacement:** The straight line distance between the start and finish point.

YOU MUST DO ALL OF THE VOCAB
WORDS!!!!!!!!!!!!!!!!

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__KEY CONCEPTS:__

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__Mathematical Symbols: __

__Distance
has units of m.__

x =
distance in the horizontal direction
(+x values move right. –x values
move left)

y =
distance in the vertical direction. (+y values move up. –y values move down)

v_{o}
= initial velocity (often the value for this is zero – if the object is at rest
to start)

v_{f}
(or just v) = final velocity

Dv = change in velocity (Dv is __ALWAYS__ found: v_{f}-v_{o})

v =
Average velocity (ALWAYS has a bar over it.
No bar means INSTANTANEOUS

VELOCITY.)

v =
Dv/2.
WHY? Because you are taking an
average of your initial and final velocities

__Acceleration
has units of m/sec ^{2} or m/s^{2}.__

a =
acceleration. (same rules applies to a
as did v. See variations on v
above. Example,

average a = Da/2, a_{o} is initial acceleration.…etc.)

g =
acceleration due to gravity on the earth which is always 9.8 m/s2.

** Vectors vs. Scalars:** A vector quantity has both magnitude (a number) and a
direction. A scalar quantity has only
magnitude but the direction is not specified. (p. 33-35)

**Scalars: ** distance, speed, mass, weight, work, time, energy

In the textbook you will find **bold** symbols are __vectors__. Non-bold symbols are scalar.

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__Graphing:__

The first word is on the y-axis, the
second is on the x-axis (Example:
“Imagine you are looking at a distance vs. time graph”…. Distance is y-axis, time is x-axis)

__Need to know graphing facts:__

The
**slope** of a distance vs. time graph
gives you the average velocity (see p. 40)

The
**slope** of a __tangent line__ to a
point on a distance vs. time graph is instantaneous vel.

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__Fast conversion tricks:__

Km/hr
into m/sec: Multiply the Km/hr quantity
by 0.278 (see p. 43)

m/sec
into Km/hr: Divide the m/sec quantity
by 0.278

__Free Fall:__

- When you throw and object up, it has an apex velocity (apex means “top of the flight”) of 0 m/sec. (Think about it: It goes up, stops and then turns around and comes right back down – LOOK OUT BELOW!)

- An object returns to the earth at the same speed from which it was thrown, but in an opposite direction. (Think about it: What do you think happens to bullets?)

- When you throw an object, it ALWAYS
undergoes a DOWNWARD acceleration of 9.8 m/sec^{2}. This is true for the ENTIRE flight, even
when it has an apex velocity of

0
m/sec. The Earth never stops
pulling! Gravity never takes breaks!

__KEY FORMULAS:__

COPY **ALL**
OF THE FORMULAS FROM P. 57 HERE. YOU
MUST COPY ALL OF THE FORMULAS FROM EACH SECTION

__EXAMPLE PROBLEMS:__

ANY TOUGH ONES FROM THE CHAPTER THAT YOU
DON’T UNDERSTAND OR THINK YOU MIGHT FORGET, PUT THEM HERE. OR AT LEAST MAKE NOTE THAT ON P. 53 THERE IS
A FREE FALL EXAMPLE….ETC. Don’t feel
obligated to write all of the example problems. They will remain in the book for future reference. But working them out in your own handwriting
sometimes offers worlds of insight!