Physics in Action
Kinematics = the study of
motion
Physics in Action
p13
Project rationale
Read pages 128-129
Record 2 questions about the project
(what do you need to know to get
started) and 2 comments
(summarize what the project is
about) on the handout as you read.
(You need at least 2 each)
Which activities are considered
sports?
p14
Make this T-chart
Sports (10 minimum)
Activities that are
NOT sports (5
minimum)
Define the word “sport” …
Sports Casting
Write a script for a 30 second sport voiceover (the sport is your choice)
Don’t forget to introduce yourselves…
Explain why/how your sport fits the
definition for “sport”
Describe specific actions/plays that
demonstrate motion and the following
physics words:(used correctly!) in your
script: speed, velocity, acceleration, and
safety
Practice your presentation! Everyone
must play an active role for credit
Presentations are TODAY!
Watch the other groups present and think
about what parts of the presentations you
like best.
Reflection (on the back side): describe at
least 3 ways that you could improve your
presentation for next time (YES! There
WILL BE a next time!)
Anyone want to read their sports
script?
p14
Watch/listen to the other groups
present and think about what parts
of the presentations you like best.
Reflection (on the back side):
describe at least 3 ways that you
could improve your presentation for
next time (YES! There WILL BE a
next time!)
Speed – Day 1
How do we measure speed?
Record your answer to the following:
What is speed? How do we measure
speed? What units are speeds
measured in? How do you know?
Share with your lab partners
Groups are ASSIGNED (no switching!)
p15
Dune Buggy Brigade
get your assigned equipment box and follow the
instructions.
When you are finished, make sure all the
equipment is returned IN WORKING ORDER to
the box and put the box back on your lab bench
Each person must record everything in their own
notebook
Measure the speed of your car using only the
contents of your box (car, tape measure, stop
watch)
You have 10 minutes to do this and return to
graph your data
More directions…
p15
Record your procedure in your notebook.
Record your data (including units!)
Make a distance vs time graph (use a graph
stamp in the front of the room to make a grid in
your notebook BEFORE graphing)
distance
time
Calculate the speed of your car
Explain how you calculated the speed
of your dune buggy
Optional: if you finish and there is
enough time, do the same steps for
a second car (get the new car from
Mrs. D)
p15
Presentations
Record what your group did on a
white board to present to the class
Procedure (picture or words)
Graph
Speed calculation
p15
Our Model for Speed (so far…)
Driving Question: How can we describe motion?
1.) Speed is the distance over the time
s=d/t
2.) Speed can be measured in mi/hr
ft/min in/sec m/sec
3.) Use metric! m/sec
4.) Velocity is the speed AND direction
of the object v=d/t (positive velocity is
forward; negative velocity is
p16
backwards)
Questions
p15
1) Group X measured the time it took the
car to travel 1 meter and calculated the
speed as 2 m/s. Group Y measured the
distance that the car went in 10 seconds
and also calculated a speed of 2 m/s.
Which method do you think is better?
Why?
2) What is the difference between speed
and velocity? Explain how 2 cars could
have the same speed, but different
velocities.
Speed 2
p15
Record these answers in your notebook
3.) Group K measured the speed of
their car as 4 meters/second. Group J
measured the speed of the same car
as 12 feet/second. Explain which
speed is better for physics class.
4.) Explain how the wrong units can be
“fixed”. Did both groups come up with
the same answer?
More ways to calculate speed…
Complete Worksheet #1 (talk each
problem out with your group and
make your best guess – consider this
a pretest of what you can do)
Get your work stamped when you
finish each panel
p17
Finish pages 14-17
Turn in your script (Benchmark #1)
Review
Worksheet 1 answers
26.) 1m/0.5s = 2 m/s
27.) 8m/4s = 2m/s
28.) 50m/10s = 5 m/s
29.) 8km/h x 1 h = 8 km
30.) 10m/s x 40s = 400 m
31.) 10km/h x 0.5h = 5 km
Next time question…30km WHY?
Using a motion sensor
What does a graph
of motion away
from the sensor
look like? Make your
prediction in one color, and
then use a second color (or
a highlighter) to show the
actual graph
p
o
s
i
t
i
o
n
time
p17
p17
Using a motion sensor
What does a graph
of motion towards
the sensor look
like? Make your
prediction in one color, and
then use a second color (or
a highlighter) to show the
actual graph
What if the object
goes slower?
Faster?
p
o
s
i
t
i
o
n
time
Rest, Stop, and Motion
Define the
following words
And make a
position graph and
label the words on
the correct location
of the graph
Rest
Motion
Uniform motion
p
o
s
i
t
i
o
n
time
p18
The rate at which position changes is
called velocity
Velocity = distance/time
V=d/t
What is the average velocity of a
marathon runner who runs 26 miles
in 3 hours and 15 minutes?
Uniform motion
In uniform motion the speed is
constant.
But so is the direction of motion
In other words, an object in uniform
motion has constant velocity
The velocity of an object is its speed
and direction
Can two cars moving with the same
speed collide? Explain
Can two cars moving with the same
velocity collide? Explain
Acceleration
Accelerated motion occurs when the
velocity of an object is changing
If the velocity changes at a constant rate,
the motion is called uniform accelerated
motion.
The rate at which velocity changes is
called acceleration
Acceleration = change in velocity
change in time
A = v/t
Accelerated motion includes:
Speeding up (acceleration)
Slowing down (deceleration)
Changing direction (so an object with
constant speed can be acceleration if
it is going in a circle because the
direction is always changing) (also
acceleration)
Make up a story to go with each
graph
p18
Now let’s add to our model for speed
Driving Question: How can we describe motion?
5.) When you make a position graph for
constant (uniform motion) the result is a
straight line
p16
6.) The slope of the line is velocity
7.) Slow motion has a gradual slope
8.) Fast motion has a steep slope
9.) If the speed is changing continuously,
then the graph is a curve (acceleration)
Worksheet 2
p19
Worksheet 2
p19
Label Motion graphs
Acceleration problems (32-37)
Get your paper stamped on each side
when finished
Did you Finish your script?
Do you need to make notebook
revisions this week?
Worksheet 2 answers
Check your work
32.) (100km/h)/10s = 10 km/h/s
33.) (40km/h)/10s = 4 km/h/s
34.) (25 m/s)/5s = 5 m/s2
35.) 2m/s2 x 10s = 20 m/s
36.) 5 m/s2 x 3s = 15 m/s
37.a) C, A=B
b) C, A=B
c) A,C,B
Moving Man Simulation
p20
Google phet
– Click
– Click
– Click
– Click
on
on
on
on
“play sims”
“physics”
“motion”
“Moving Man”
Follow the directions on the handout
to complete each part
Get a stamp when you are finished
Make sure your computer is OFF
before you close the lid
Now let’s do Worksheet #3
Use 2 colored pencils…one to show your
prediction, and one to show the final answer
p21
Let’s add what we learned about velocity graphs to
our Model for speed
10.) Velocity can be positive (forward)
or negative (backward) so our y-axis
must be modified (area below the xaxis)
11.) Constant motion=constant
velocity which is a straight line (look
like stair steps)
12.) At the present time we are
ignoring how/when objects speed up p16
or slow down
Worksheet 3 Answers
Practice exercises
1.) distance = speed x time
= 340 m/s x 2.6 seconds
= 884 meters
2.) velocity = distance/time
= 1000m/7.045s
= 141.9 m/s
Now let’s look at another way to
view motion…
Motion maps
Read the article (worksheet 4)
Complete worksheet
Finish pages 18-22 for notebook
check
p22
What would the motion map for
each object look like?
A ball rolling slowly
A ball rolling fast
A ball that speeds up
A ball that slows down
A ball that rolls fast, hits the wall and
bounces back slowly
A student who walks in the room,
stands around for 3 seconds, and
p22
then leaves the room
Now add motion maps to our
Model of Speed
p16
13.) Objects moving slowly are
represented by short arrows. Objects
moving faster are represented by
longer arrows.
14.) Arrows point in the direction of
motion
15.) Objects that stop moving leave a
dot for each period of time that they
are motionless.
Worksheet 4 answers
1.a) the car is moving at constant speed
b) Speeds up then slows down
2.a)
speeds up
constant speed
b)
constant speed
slows down
3.) d=vt=(350ft/s)(20s)=7000 ft
p22
More worksheet 4 answers
p22
4.a) v=d/t=215mi/4.5h=48 mi/h
b.) probably 48 mi/h, maybe faster
or slower
5.) v=d/t=5mi/0.25h=20 mi/h
6.a) forward at constant speed, then
at rest
b.) forward fast, rests, backward slow
c.) forward constant slow, constant fast
d.) speeds up
Quiz 1
p24
NO PHONES! Only calculators
allowed during the test.
Answer each question the best you
can
Turn in your quiz
Worksheet 5 – try graph #1-2 AND
do the back (p154) 1-3, 6-10
Ave vs instant speed
p23
Watch the video and answer these questions:
Instantaneous means:
Average speed =
30 km/0.5 hr =
180 km/3 hr =
70 km/1 hr =
0 km/0.5 hr =
80 km/1 hr =
If your average speed to drive home is
20mph, why will your instantaneous speed
be different? Give 2 examples
p25
Draw on the graph to
show speeding up
motion. Label it
acceleration.
Draw on the graph to
show slowing down
motion. Label it
deceleration.
p
o
s
i
t
i
o
n
time
REVIEW
Position graphs
Show relationship
between distance and
time
Straight line=constant
motion
Curve shows
acceleration
Slope =rise/run
Velocity=d/t
p25
Velocity graphs
REVIEW
Show relationship
between velocity and
time
Horizontal
line=constant motion
Sloped line=changing
motion
Area under the
curve=displacement
D=vt
A=v/t
Acceleration graph
Shows the relationship
between acceleration
and time
Area under the curve
is velocity
V=at
D=1/2 at2
Standing still
(not moving or at rest)
Constant velocity
(forward or backward)
Changing velocity
(speeding up or slowing down
Worksheet #5
(complete this after the quiz today…)
1. Average vs instant speed…
2. S=d/t
3. Acceleration is speeding up (+),
slowing down (-), or changing
direction
6. a=change in velocity/time
7. Use words
10. Use arrows
p23
Worksheet 5
p23
p23
Worksheet 5 answers
Get your paper stamped when you
finish today
Then we will go over the answers
tomorrow
Worksheet 6 today do
Checking Up (p64) 1-5
Get your work stamped when finished
Now add motion maps to our
Model of Speed
p16
16.) there are 3 types of acceleration.
(+) forward, (-) backward, and changing
direction (at a constant speed)
17.) acceleration is the change in velocity
divided by the change in time a=Δv/Δt
(Δ means the change over time)
18.) distance when traveling a constant
speed is d=vt
Distance when accelerating is d=1/2at2
Worksheet 5 answers
2.a) 1/15= 0.06 km/s
b) 84/6 = 14 m/s
c) 9.6/2= 4.8 km/h
d) 400/4.5= 89 km/h
3.a) negative acceleration
b) positive acceleration
c) no acceleration
d) negative acceleration
e) no acceleration
f) no acceleration
p23
Worksheet 5 answers
p23
6.a) a=-45/9= -5km/h/s
b) negative acceleration
7.a) constant speed
b) positive acceleration
c) constant speed, speeds up, then
returns to same constant speed
d) neg acceleration, constant speed,
positive acceleration
More worksheet 5 answers
8.) 100/2= 50 m/h
9.) explain how instant speed is
different from average speed
10.)
Acceleration
constant speed
p23
Worksheet 6
Use your notes to complete both
sides of worksheet 6.
Get your work stamped when
completed
p26
Worksheet 6 answers
1.) yes. Constant velocity
2.) yes. If you spin in a circle
3.) no. if one has a head start
4.) no. slow vs fast acc from zero. Both
will eventually have the same speed
5.) yes. If acc is neg, or if fast constant s
6.) yes. But speed signs assume you will
drive forward between the lines…
p26
More worksheet 6 answers
7.a) v=at=(2/5)(20)= 48 mi/h
average velocity= (48-0)/2= 24 mi/h
b) distance=vt=(24)(2/60)= 0.8 mi
11.a) B
b) D
c) E
d) A
p26
e) F
f) C
Thursday
Benchmark 2
Project groups assigned!
– Write your group contract
– Have each member sign at the bottom
– Group name
– Choose a sport
– Find/make 2 minutes of video for your
sport
Friday
Project time
Benchmark 2
– Write your group contract
– Have each member sign at the bottom
– Group name
– Choose a sport
– Find/make 2 minutes of video by
Monday
– Record o URL of the video on page 13
– Begin Google powerpoint slides
Quiz #2 today!
Review worksheet 6 answers
NO PHONES! Only calculators
allowed during the test.
Answer each question the best you
can
Turn in your quiz
Worksheet 7 (after you finish the
quiz)
Review
now we have 4 ways to describe motion
Position (or distance) vs time graphs
Velocity vs time graphs
p27
Written description
Motion maps
Watch the video and describe what
happens to the ball
Now make a position graph, a velocity
graph, and a motion map for those
actions
Project benchmark #3
Find a part of your video that shows
each kind of action (in any order) at
rest, constant velocity, acceleration
Complete the description, position
graph, velocity graph, and motion
map for each
Start google slide show/prezi
Prezi example
p27
p27
Skip to Newton’s Laws of
Motion PPT
Then return for the rest of
these slides
Do objects roll faster, slower, or
at constant velocity on a flat
(horizontal) frictionless surface?
Newton’s first Law predicts that…
p44
Horizontal
motion
Constant motion
Newton’s 1st Law
says…
Velocity
Distance
v=d/t
d=vt
Average velocity=
instant velocity
If an object is moving
at 30 cm/s how far
does it move each
second?
Time
seconds
Distance (cm)
D=vt
0
=(30)(0)=0cm
1
2
3
4
5
6
Do objects fall faster the longer
they fall?
• What would you hear if the
washers were evenly spaced on the
string?
• Describe the time intervals between sounds
same spacing:
increasing space:
• What can you say about the distance
travelled by a falling object during
p44
each second of travel?
Vertical
motion
Accelerated
motion
(speeding up or
slowing down)
Velocity
v=at
If an object starts at
rest and begins
freefall how far does
it fall each second?
Time
(seconds)
Distance
D=1/2at2=5t2
0
(5)(0)2=0
1
2
3
Distance
4
d=1/2at2
5
6
Average velocity
= v0 + vf/2
Projectile
motion
Now combine
both the
horizontal and
vertical
components. Plot
the horizontal
distance on top,
the vertical
distance on the
side, and then
mark the
projectile position
each second.
Which metal ball will hit the
ground first?
p45
Draw the apparatus
Draw a force diagram for each ball
One that is pushed
off the table and
lands several feet
away
One that is
dropped straight
downwards
All objects fall to the ground at
the same rate because… p45
Motion model
p16
19.) Objects have horizontal motion if an
unbalanced force pushed or pulled them
v=d/t
d=vt
Objects have vertical motion (freefall) because
of gravity (and possibly additional force) v=at
d=1/2at2=5t2 gravity=10m/s2
20.) Horizontal and vertical forces are
independent from each other. Projectile motion
is the combination of both horizontal and
vertical motion. The range depends on the
launch angle and horizontal speed
Projectile motion
Review CDP 4-1
Do CU (p182) 1-3
Get a stamp when finished
p45
PtoGo (p182)
Each group does one problem on a
whiteboard to share with the class
Record each problem as it is
presented in your notebook
Mythbusters bullet motion
Finish CDP 5-1 on your own
More Projectile motion
Bill Nye video – Review of Motion
and forces
p46
CDP 6-1 (together)/7-1
Review PtoGo (p182)/CDP 5-1
P47
CU(p189)1-3/PtoGo(p194)1-3
-48
Finish worksheets: get stamps when
done
Work on project
Projectile motion animation
CU (p189)1-3
p49
PtoGo (p194) 1-3
Get all handouts (p46-49) stamped
when finished
Work on project…next deadline Friday!
Quiz tomorrow!
Group Quiz
Must stay in your seats
Raise your hand if you need anything
Work only with your assigned group
members
All members must complete a quiz
for credit
Mrs. D will bring the stapler when
you are finished
Work on project!
Physics In Action Project
Example: Tennis
Complete the large paper
Complete the visual aid (googledoc
slideshow)
Presentations are Tuesday
what will you wear?
what other props/posters do you need?
when will you get together and practice?
Unit Test Wednesday
What to study for the Unit Test
Everything in your notebook for
motion and forces
Especially the motion model (p16)
and the force model (p32)
Newton’s Laws tutorial
Review Jeopardy (on my website)