Download ELAInteractiveVideo_G8

Interactive Video Script Template
Course
Grade 6
Lesson
Objective
Semester
A
Unit
5
Lesson
8
Students will define the term acceleration.
Students will describe the relationship between force and acceleration.
CLIP A (Introduction)
Visual
<image>
Audio
Have you ever watched a car commercial
where the car was advertised to go from
zero to sixty in a specific amount of time?
http://pixabay.com/en/lamborghini-brnoracing-car-618356/
<image>
http://pixabay.com/en/gas-pedal-clutchpedal-clutch-397481/
You may have understood this
advertisement to be describing the
acceleration of the car, which is how most
people think about acceleration.
<image>
http://pixabay.com/en/stopwatch-timetreadmill-race-259303/
But to a scientist, acceleration means
more than just starting from zero and
reaching a top speed. Acceleration
means a change in velocity.
<image>
http://pixabay.com/en/curvy-road-signcrooked-road-sign-26514/
In fact, any change in velocity, or even a
change in direction, results in acceleration!
<image >
http://pixabay.com/en/traffic-lights-lightarrow-444639/
That means that in addition to the car
beginning to move from a complete stop, a
car that stops at a traffic light accelerates,
and a car that makes a turn at that light
also accelerates!
Question A
Stem: What is acceleration?
Answer Choices:
A. Increase in speed
B. Decrease in speed
C. A change in velocity
D. A change in motion
Correct Response (C)
(Video progresses to clip B)
Incorrect Response (A, B, D)
(Video progresses to clip E)
CLIP B (DOK1)
Visual
Audio
<image>
The acceleration of an object is its change
http://pixabay.com/en/abstract-abstraction- in velocity.
acceleration-219915/
<image>
http://pixabay.com/en/soccer-football-ballsport-playing-146218/
According to Newton’s first law of motion,
if all of the forces on an object are
balanced, if the object is not moving, it will
stay at rest. And if it is moving, then it will
continue its motion in the same direction.
<image place side by side>
http://pixabay.com/en/football-ball-soccersports-game-155528/
http://pixabay.com/en/arrow-up-downtraffic-downloads-145532/
If all the forces on an object are balanced,
meaning a force in one direction has an
equal force in the other direction, its
acceleration will be zero.
<image crop as indicated and place side
by side>
http://pixabay.com/en/arrows-red-set-updown-left-147741/
http://pixabay.com/en/football-ball-soccersports-game-155528/
The object would only accelerate if an
unbalanced force, or force that is in an
unequal magnitude and opposite direction
than other forces, acts on the object.
Question B
Stem: If all forces on an object are balanced, what is the acceleration?
A. It increases
B. Depends on the direction of the force
C. Zero
D. Depends on the mass of the object
Answer Choices:
Correct Response (C)
(Video progresses to clip C)
Incorrect Response (A,B D)
(Video progresses to clip F)
CLIP C (Increased DOK2)
Visual
Audio
<image>
http://pixabay.com/en/road-sign-attentiondistrict-about-464661/
An unbalanced force can act on the object
and change its speed or its direction, or
both the rate of position change and
direction.
<image crop as shown>
http://pixabay.com/en/accelerate-arrowup-direction-154141/
The acceleration of the object depends
directly on the total force that acts on the
object. As the total force increases, the
acceleration increases.
<image crop as shown>
http://pixabay.com/en/arrows-blue-downpointing-35259/
The acceleration also depends on the
mass of the object, but in an opposite way.
As the mass increases, acceleration
decreases.
<image place side by side>
http://pixabay.com/en/kilogram-massweight-10-gravity-147629/
http://pixabay.com/en/cross-box-deletemark-select-vote-27168/
http://pixabay.com/en/abstract-abstractionacceleration-164329/
The relationships between acceleration,
force, and mass are described by
Newton’s second law of motion…
Scientists write this relationship as:
Force equals mass times acceleration.
Question C
Stem: If the mass of an object increases, how is the acceleration affected?
Answer Choices:
A. Increases
B. Decreases
C. No change
D. Goes to zero
Correct Response (B)
(Video progresses to clip D)
Incorrect Response (A, C D)
(Video progresses to clip G)
CLIP D (Increased DOK3)
Visual
Audio
<image crop as shown>
http://pixabay.com/en/arrow-direction-turnset-left-36877/
Like force and velocity, acceleration has a
magnitude and direction, so it is a vector.
<image place side by side >
http://pixabay.com/en/push-pushing-movemoving-action-150175/
http://pixabay.com/en/arrow-right-bluehanddrawn-310633/
Because acceleration is directly related to
the force, it will be in the same direction as
the acceleration. So if we know the
direction of the acceleration, we know the
direction of the force that caused it.
<image place side by side >
http://pixabay.com/en/push-pushing-movemoving-action-150175/
http://pixabay.com/en/letters-abcalphabet-journal-font-451474/
Because acceleration is directly related to
force, it changes with the same proportion
as force. So if the force acting on an
object is doubled, the acceleration also
doubles.
<image place side by side>
http://pixabay.com/en/kilogram-massweight-10-gravity-147629/
http://pixabay.com/en/half-half-time-halflife-time-145736/
However, the opposite effect happens for
the mass. If the mass of an object is
doubled while the force stays the same,
the acceleration of the object is reduced
by one-half.
Question D
Stem: If the force acting on an object is reduced by one-half, what happens to its
acceleration?
Answer Choices:
A. Reduced by one-half
B. Doubles
C. Triples
D. Zero
Correct Response (A)
(Video progresses to Success Alert)
Incorrect Response (B, C, D)
(Video progresses to clip H)
CLIP E (Remedial 1)
Visual
<image>
Audio
Imagine you are watching a car race on a
straight track. The cars are driving very
fast, but would you be surprised to learn
that if they aren’t changing their direction
or speed, they aren’t accelerating?
http://www.morguefile.com/archive/display
/218403
<image>
http://pixabay.com/en/stopwatch-timetreadmill-race-259303/
That’s because, by definition, acceleration
is a change in velocity. Remember,
velocity is the rate at which an object
changes its position.
<image>
http://pixabay.com/en/winding-road-roadtravel-553481/
That means that in this case, the car must
either speed up, slow down, or change its
direction by turning the wheel, in order to
accelerate.
<image>
http://pixabay.com/en/road-sign-asphaltroad-sign-90390/
Acceleration includes any change in
velocity, even a decrease in the rate of the
position, is considered to be acceleration!
Question E
Stem: Which of the following situations are considered to be acceleration?
Answer Choices:
A. A car turns left at a constant rate
B. You pedal your bicycle at a constant rate in a straight line
C. A book is sitting on a table
D. A person is walking on a straight path at a constant rate
Correct Response (A)
(Video progresses to clip B)
Incorrect Response (B, C, D)
(Video progresses to clip F)
CLIP F (Remedial 2)
Visual
<image>
http://pixabay.com/en/speedometertachometer-gauge-mph-153399/
Audio
Any time an object changes its velocity, it
is accelerating. If velocity remains
constant, the object is not accelerating.
<image>
http://pixabay.com/en/the-ball-stadionfootball-the-pitch-488700/
Newton’s first law of motion explains
inertia and states that an object at rest will
remain that way and an object that is
moving will continue to move at the same
rate and direction.
<image place side by side>
http://pixabay.com/en/arrows-up-downgreen-159565/
http://pixabay.com/en/the-ball-stadionfootball-the-pitch-488700/
According to inertia, an object with forces
that have equal forces in opposite
directions, or balanced forces, will have
zero acceleration.
<image>
If a ball is sitting on the ground, there are
equal forces between the ball and the
Earth. If you add an unbalanced force by
kicking the ball, you will cause it to
accelerate.
http://www.morguefile.com/archive/display
/857633
Question F
Stem: What is a quantity that only tells value and not direction?
Answer Choices:
A.
B.
C.
D.
Vector
Scalar
Total
Average
Correct Response (B)
Incorrect Response (A, C, D)
(Video progresses to clip C)
(Video progresses to Intervention Alert,
bringing students back to clip B)
CLIP G (Remedial 3)
Visual
<image>
Audio
The rate at which an object moves in a
particular direction can be changed if an
unbalanced force acts on it.
http://pixabay.com/en/catcher-baseballyouth-sport-ball-632974/
<image>
The unbalanced force will cause the object
to accelerate, which will depend on the
total force acting on the object. As the
force increases, the acceleration will
increase also.
http://pixabay.com/en/baseball-sportsplate-home-97898/
<image>
http://pixabay.com/en/ball-base-fieldobject-sport-315494/
The mass of the object also affects the
acceleration, but in the opposite direction.
As the object’s mass increases, the
acceleration decreases.
<image place side by side-make middle
image (x) smaller>
http://pixabay.com/en/kilogram-massweight-10-gravity-147629/
http://pixabay.com/en/cross-box-deletemark-select-vote-27168/
http://pixabay.com/en/abstract-abstractionacceleration-164329/
Newton’s second law of motion explains
this relationship between mass, force, and
acceleration. Mathematically, we can
explain it by saying force is equal to mass
times acceleration.
Question G
Stem: If the total force acting on an object increases, how is the acceleration affected?
Answer Choices:
A.
B.
C.
D.
Increases
Decreases
No changes
Goes to zero
Correct Response (A)
(Video progresses to clip D)
Incorrect Response ( B, C,D)
(Video progresses to clip F)
CLIP H (Remedial 4)
Visual
Audio
<image crop as indicate>
http://pixabay.com/en/arrows-road-streetasphalt-500751/
Like velocity and force, acceleration has
direction of movement too, so we call it a
vector.
<image>
http://pixabay.com/en/golf-arrow-golf-ball549230/
Acceleration is directly related to the force,
so the direction of the force. The direction
is inversely proportional, however. If the
force comes from the right, the
acceleration will be to the left.
<image place side by side>
http://pixabay.com/en/golf-arrow-golf-ball-
The acceleration will also change if the
force changes. If the force doubles, the
549230/
http://pixabay.com/en/letters-abcalphabet-journal-font-451474/
acceleration will also double.
<image place side by side>
http://pixabay.com/en/kilogram-massweight-10-gravity-147629/
http://pixabay.com/en/half-half-time-halflife-time-145736/
Mass also affects the acceleration, but in
the opposite direction. So, if the mass is
tripled, the acceleration will be reduced by
one-third.
Question H
Stem: If the mass of an object is reduced by one half, what happens to its acceleration?
Answer Choices:
A.
B.
C.
D.
Reduced by one-half
Doubles
Triples
Zero
Correct Response (B)
(Video progresses to Success Alert)
Incorrect Response (A, C, D)
(Video progresses to clip G)