Improvements
1. Use graphs on p. 337 & 339 & 341
2. Better notes on slope!
3. Freefall! – have students determine reaction
time with ruler. Bigger notecards would be
better. (better later I think)
4. Determine heights based on dropping things!
Schedule
• Friday
– Check & review displacement graph homework
– Displacement graph notes
• Monday 3/11
– Review homework & graphs
• Tuesday - No class
• Wednesday - No class
• Thursday
– Return quizzes!
– Slow glider lab
• Friday
– Position (displacement) graph quiz
Bell Work (on 2.1 sheet)
• Skiers have set world records by reaching
speeds of over 240 km/hr. How many miles
per hour is this? (1 km = 0.621mi)
Bell Work 3/5/14
Start a new BW sheet titled “x, v, & a”
1. Calculate the density of an object with a
mass of 15.0 g and a volume of 5.0 cm3.
2. Calculate the mass of an object with a
density of 55.0 kg/m3 and a volume of 20.00
m3.
3. Calculate the volume of an liquid with a mass
of 101 g and a density of 32 g/mL .
What is physics?
“the study of matter, energy, and the interaction
between them”
How much weight can this bridge hold?
How should we launch this projectile?
How fast can one drive around this curve?
What will the temperature in the room be?
How does sunlight heat Earth?
How did the universe begin?
Today you are going to…takes notes on distance,
displacement, speed, & velocity.
So you can…develop an understanding of how to describe
motion and solve motion problems.
You’ll know you’ve got it when you can
• Accurately complete the notes sheet & questions
• Define & differentiate between distance and displacement
• Define & differentiate between speed and velocity
Distance
• The length of the path described by an object
moving through space
OR
• Length of the path something travels
• Units of length
– mi, km, m, yd, ft, in, cm, …
•
No “/” sign!
– Ex: 4.0 mi
35.0 km
Displacement
• The change in position of an object
• Distance between starting point and ending
point of object
– Includes direction
•
Can be negative (negative represents direction)
– Is always a straight line
– Units of length
•
mi, km, m, yd, ft, etc.
– Examples
•
•
4.0 miles north
35.0 km @ 35o
Start
Finish
Displacement vs. Distance
• Similarities
– Both measure lengths
– Same units
• Differences
– Displacement has direction, distance doesn’t
• Displacement may be negative (negative direction)
– Displacement is always a straight line
Displacement vs. Distance
• The track is 0.25 mi. Thomas runs around the
track 4 times, then collapses exactly where he
started. What distance did he run? What was
his displacement?
Displacement vs. Distance
• Ok, now you know the difference between
displacement and distance!
• When we’re math problems or graph problems in
here, we usually won’t worry about the
difference. You’ll get into that more in physics.
• We’ll use the variable “x” for both. When we did
density, we used the variable “D” for density. It
seems strange to use x for displacement, but
that’s how it is yo!
Rates
• Anything measured with respect to something
else.
• Ex: How quickly water is leaking from a faucet
could be described in liters per hr (L/hr)
• Other rates?
Speed
• Rate of change of distance with respect to time
(how fast an object is moving)
• speed = distance
time
• Units of m/s, ft/s, mph, km/hr, km/s, etc.
• Ex. 55 mi/hr
23 m/s
Velocity
• Rate of change of position with respect to time
(speed with direction)
• Velocity= displacement
time
• Units of m/s, ft/s, mph, km/hr, km/s, etc.
• Ex. - 55 mi/hr
23 m/s @23o
Speed vs. Velocity
• Similarities
– Both measure rate at which an object moves
– Same units
• Differences
– Velocity has direction, speed doesn’t
– Velocity may be negative
• Means it’s moving in the negative direction
Speed vs. Velocity
• Ok, now you know the difference between speed
& velocity.
• When we’re math problems or graph problems in
here, we usually won’t worry about the
difference. You’ll get into that more in physics.
• We’ll use the variable “V” for both.
Constant
• Constant – staying the same (remember constant variables?)
– Constant speed – speed stays the same
• Most things don’t move with a constant speed.
– Constant velocity – velocity stays the same
• Means both speed AND _______________ stay the same
• Most things don’t move with a constant velocity.
• If something is moving with a constant velocity of
5.0 mi/hr, what does that mean?
– How far will it travel in 1 hr? 2 hr? 5 hr?
• If something is traveling with a constant velocity of
20.0 m/s, what does that mean?
– How far will it travel in 1.0 s? 2.0 s? 7.0 s?
– What equation did you use for the above?
Do the cow questions in your notes.
1. A cow runs 25 m in 5.0 seconds. What is the
cow’s average velocity? (show your work)
2. The cow then runs the opposite direction
with the same speed. Average velocity?
Speed
• If you are traveling 80 mi/hr, how long does it
take you to go 80 miles?
– Chelsea’s answer
Instantaneous Speed/Velocity
• Speed or velocity at an extremely short time
interval
• (speed or velocity at an instant in time)
– Speedometer
– Radar gun
Bell Work 10/23/14 – 3 min
Put your homework upsidedown on your desk.
1. What are two ways distance and
displacement are different?
2. Identify which color path gives distance and
which color path gives displacement.
3. True or False: Displacement is always greater
than or equal to distance.
Finish
A
A
Start
B
1. 5.0 mi
2. 30.5 m/s
3. 89 min
4. 45 m/s/s
5. - 15 mph
6. 6.02 in
7. 25 m/s2
8. 4 hours
9. 3 laps
10. 10 mi/hr/s
x, t, V, or a?
V=?
X = 50.0 m
t = 2.0 s
V=?
x = 200.0 m
V = 50.0 ft/s
x = 100 m
V = 2.0 m/s
x = ? m = ? ft
t = 2.0 s
t=?s
t = 40.0 min
V = 10.0 m/s
X = 50.0 m
t=?
V = 20.0 m/s
X=?
t = 1.5 min
Solving speed & velocity problems
1. Identify the variables
Units help! Include them!!
2.
3.
4.
5.
Convert units if necessary
Write the equation
Plug into the equation & solve
Include units & correct # of sig figs in your
answer…convert units if necessary
• Monica Burns is running with a velocity of 12.0
m/s. How long will it take her to cover the length
of a basketball court (28.7 m)?
• Blaze throws a 50.0 mph fastball. How many
feet will the ball go in 2.0 s?
• Kevin can run around the track 6 times in 10.0
minutes. If the track is 0.25 miles around,
what is his average speed?
Bell Work 10/24/14
• Put your homework upsidedown on the desk
to be checked.
1. David throws a 65.0 mph fastball. How many
feet will the ball go in 2.0 s?
Bell Work 10/27/14
1. Monica Burns is running with a velocity of 39.4
ft/s. How long will it take her to cover the
length of a basketball court (28.7 m)?
2. W5SAYWoS
Relative Velocity
• How fast are you going right now?
– http://www.youtube.com/watch?v=wIzvfki5ozU
– Also deals with acceleration
– But it’s perhaps over your heads
• Monty Python Song
– http://www.youtube.com/watch?v=vIy76M-4txo
– A little more approachable, and culturally
significant!
– 1 light year distance light can travel in one year’s
time. (9,461,000,000,000 km or 5,878,000,000,000 mi)
– 6 trillion miles! (1 sig fig)
– *could also add cool solar system movement into this slide or near
here! Maybe that’d be more relevant to acceleration though.
Relative Velocity
• Velocity changes depending on your frame of
reference. Everything everywhere is moving
relative to something. A “frame of reference”
is what you consider to be standing still.
Calculating relative velocity
• Choose one direction to be positive. The
other is negative. Add the velocities.
Relative Velocity
• A bus is traveling at 35 mi/hr. Amber throws an
apple at the bus driver with a velocity of 25 mi/hr
toward the front of the bus. What is the apple’s
velocity relative to the bus driver?
Relative Velocity
• A bus is traveling at 35 mi/hr. Amber sees Jason
standing alongside the road. She leans out the
window and throws an apple at him with a velocity
of 25 mi/hr toward the front of the bus. What is the
apple’s velocity relative to the Jason?
Relative Velocity
• Cameron is racing Vittoria. He is behind, but driving
at 25 mi/hr west. Vittoria is driving at 23 mi/hr west.
What is Cameron’s velocity relative to Vittoria?
Relative Velocity
• Mythbusters soccer ball!
Optical Illusion
• Stare long enough and you’ll see a giraffe!
Relative Velocity
• Kennedy realizes the railroad man is going to catch
her, and she’s stolen some loot from a jewelry store.
Still running at 10.0 mph west, she throws the loot
with a velocity of 50.0 mph relative to her. How fast
is the loot moving relative to the ground?
Bell Work 10/29/14
1. Use the factor label method to convert 1 m/s
to mi/hr.
2. What does 2.0 m/s mean?
3. Morgan is riding on a boat traveling at 15
mph north. If she runs south at 7.0 m/s, how
fast is she going relative to the water?
Bell Work 10/29/14
1. Use the factor label method to convert 1 m/s
to mi/hr.
1. 2.2 mph
2. What does 2.0 m/s mean?
1. Travels 2.0 meters each second
3. Morgan is riding on a boat traveling at 15
mph north. If she runs south at 7.0 m/s, how
fast is she going relative to the water?
1. 15 + -7.0 = 8
8 m/s north
Bell Work 2/13/12 – 4 minutes
1. Put your hw on your upsidedown on the top
of your desk.
2. Andy is being chased by a Valentine’s Day
stalker. He runs with a velocity of 7.0 m/s for
35 s. Then he suddenly gets tired and slows
down to 2.0 m/s for 40.0 s. How far did Andy
run?
3. What is the formula for the slope of a line?
Bell Work 2/14/12 – 4 minutes
n T = PV
R
1. In the above equation, which variables are
directly related and which are inversely
related?
2. Draw an inverted stick figure.
3. It takes Cameron 3000 seconds to travel 500
meters. How long would it take him to travel
100 m at the same speed?
Bell Work 11/10/14 – 4 minutes
1. Blaze throws a 50.0 mph fastball. How many
feet will the ball go in 2.0 s?
2. It takes Cameron 3000.0 seconds to travel
500.0 meters. How fast did he run?
3. Give 2 differences between displacement and
distance.
4. Can an object accelerate without changing
speed?
• Find the position and velocity at:
1) 2.0 s
2) 5.0 s
3) 7.0 s
4) 12.5 s
5) 15 s
6) 15.5 s
Bell Work 3/8/12
1. Find the slope of the line that point A is on.
2. Find the slope of the line segment point D is on.
c
b
d
f
a
e
g
h
Bell Work 3/9/14
1. Find the slope of the line that point E is on.
2. Find the slope of the line segment point F is on.
3. Find the slope ofc the line segment point G is on.
b
d
f
a
e
g
h
Bell Work 3/14/14 – 5 minutes
1. Find the displacement & velocity at A, B, C, D, E, F
Displacement (m)
2.0
1.0
0.4
Bell Work 10/29/14
1. Use the factor label method to convert 1 m/s
to mi/hr.
2. What does 2.0 m/s mean?
3. Morgan is riding on a boat traveling at 15
mph north. If she runs south at 7.0 m/s, how
fast is she going relative to the water?
Bell Work 10/29/14
1. Use the factor label method to convert 1 m/s
to mi/hr.
2. What does 2.0 m/s mean?
3. Morgan is riding on a boat traveling at 15
mph north. If she runs south at 7.0 m/s, how
fast is she going relative to the water?
Bell Work 10/30/14 – 6 min
1. Find the displacement (position) and velocity of
the object in the graph:
a. 0.5 s
b. 2.0 s
c. 2.5 s
d. 4.0 s
e. 5.0 s
Today you are going to…practice finding the slope of a line &
reading distance/position/displacement vs. time graphs
So you can…develop an understanding of how graphs
describe motion learn to interpret them.
You’ll know you’ve got it when you can
• Find the displacement and velocity of an object using a
position vs. time graph.
Motion Graphs
Very useful in analyzing how the
motion of an object changes.
Getting info from motion graphs
• 3 ways to get information:
– Read graph
– Find slope
– Find area under graph*
• Look at labels of the axes!
• Let units be your guide!!!
• STUDENTS DON’T UNDERSTAND THAT V=X/T IS THE
SAME AS THE GRAPH!?
Position (Displacement) vs. Time Graph
• Read X-axis to find the position (displacement )
• Find slope for velocity
– Faster objects = steeper (or greater) slopes
– Object not moving = zero slope (flat, horizontal line)
• Area under graph means NOTHING!
`
1.
2.
3.
4.
Where is the object at 2.0 s?
Where is the object at 2.5 s?
Where is the object at 4.0 s?
Where is the object at 5.8 s?
Finding Velocity from D vs. T Graph
To find the velocity of the
object, calculate the slope of the
line segment you want to know
about.
For example: Find the velocity
of the person for the first 5
seconds of their trip.
1. Pick 2 points that are on the
line segment. Usually, the
endpoints work well.
2. Calculate the slope. Be sure
to include units.
(0, 0) and (5, 10) are the end
points.
y2  y1
m
x2  x1
10m  0m 10m
m

 2m / s
5s  0 s
5s
Finding Slope
Slope = rise
run
y2  y1
m
x2  x1
`
Find the object’s velocity at:
1. 0.5 s
2. 2.0 s
3. 2.5 s
4. 5.8 s
`
1. Story?
What is the average speed of car A for
the entire trip?
Position (displacement) vs. time graph
Each point on the line tells you where the
object is at each instant.
• A straight line shows constant velocity.
At Rest
+
Velocity
Velocity
Slope of the line gives the magnitude (amount)
of velocity.
•A curved line shows acceleration.
Concave-Up
Looks like a SMILE!
slowing down
speeding up
positive acc.
Concave-Down
Looks like a FROWN!
slowing down
speeding up
negative acc.
Creating Graphs
•
•
•
•
•
•
Title at Top (y axis vs. x axis)
Lines and scales neatly drawn/written
Key (if applicable)
Axes labeled, including units
Axes scaled & frequently marked
Scale is consistent and easy to interpret using lines
on graph paper
• graph is made large enough to read
origin begins at 0,0 if appropriate
c
b
d
f
a
e
g
h
Time Displacement Velocity
(s)
(m)
(m/s)
0
5
5
10
10
20
15
20
20
15
25
10
30
0
Position vs. Time Graph Lab
• Show all work for problems involving math.
• Round to 3 sig figs
– Precise numbers can be checked by clicking the mouse on the graph
• http://users.hal-pc.org/~clement/Simulations/Physlets/TST/PositionTime%20Graphs.html
Check out these applets…
• http://jersey.uoregon.edu/vlab/block/Block.ht
ml
• http://dev.physicslab.org/Document.aspx?doc
type=3&filename=Kinematics_PositionTimeGr
aphs.xml
Airplane Lab
Today:
Make plane
Make graphs
Start timing!
Tomorrow:
Questions?
Monday:
Due at beginning of class
Objectives
• Identify direct & inverse relationships
• Paper airplane lab
Direct & Inverse Relationships
Direct relationship
Directly across one another in equation
When on opposite sides of the = sign, both are
on top & or both on bottom
If one doubles, the other doubles!
Inverse relationship
When on opposite sides of the = sign, one’s on
top & the other’s on the bottom
If you double one, the other is halved
Directly or Inversely Related?
Bell Work 2/25/13 – 5 minutes
Displacement (m)
1. A cheetah can run 200.0 m in 6.6 s. Calculate the
cheetah's velocity.
2. A calf runs at 8.0 m/s. How long would it take to run the
length of a football field (360 ft)? 1 m = 3.28 ft
3. Identify if the velocity is positive, negative, or zero on the
graph below. Find the velocity from 3.00 – 8.00 s.
Bell Work 2/26/13 – 5 minutes
A calf walks at 2.0 meters 4.0 in seconds. Find the velocity.
A boy walks 1.5 m in the negative direction in 5.0 s. Calculate the boy’s velocity.
Find the displacement and velocity for each point.
2.0
Displacement (m)
1.
2.
3.
1.0
0.4
c
c
b
d
f
a
e
g
h
Displacement (m)
24
20
16
12
Bell Work 5/23/12 – 5 min
• Take
homework
out.
• Find position
and velocity at
each point.
Bell Work 5/23/12 – 5 min
• Take
homework
out.
• Find position
and velocity at
each point.
c
b
d
f
a
e
g
h
Homework (review)
C
B
D
E
A
Today you are going to…read about distance, displacement,
speed, & velocity, completing an accompanying notes
sheet, and review it.
So you can…develop an understanding of how to describe
motion and solve motion problems.
You’ll know you’ve got it when you can
• Accurately complete the notes sheet & questions
• Define & differentiate between distance and displacement
• Define & differentiate between speed and velocity
Bell Work 2/15/13 – 7 min
1. 15 mL of a liquid has a mass of 30.0 g. What is its
density?
2. What is the formula for velocity?
3. Brendon falls down 8.0 meters of bleachers in 3.00
seconds. What is his velocity?
4. Express his speed in feet per second (1 m = 3.28 ft).
Bell Work 3/21/13 – 3 min
1. Solve the acceleration equation for Vo.
2. Solve the acceleration equation for t.
3. Solve the acceleration equation for x by using
Vf = xt.
Bell Work 2/28/13 – 7 min
Use the factor label method to convert the following.
1. 15.0 m = ? ft (1 yd = 0.914 m, 1 yard = 3 ft)
2. Put the graphs below in order from fastest moving
to slowest.
Shania is walking when she decides to sprint down
the hallway. Starting at 3.00 mi/hr, she reaches a
speed of 12.0 mi/hr in 2.0 seconds. Calculate her
acceleration.
Bell Work
1. What angle should you launch something to
get it to go the furthest?
2. The highest?
3. What 2 angles would go the same distance?
Bell Work
1. What angle should you launch something to
get it to go the furthest?
2. The highest?
3. What 2 angles would go the same distance?
• Friday
– Catapult info
– Work on airplane labs
Schedule
• Monday
– Turn in Airplane Labs
– Projectile Notes
– Acceleration
• Tuesday
– Acceleration
• Wednesday
– Acceleration Graphs
– Take home quiz
• Wednesday
– Turn in take home quiz
– Acceleration Graphs
– Intro car activity
• Thursday
– Car activity!
Today you are going to…take notes on and complete a
worksheet on acceleration.
So you can…develop an understanding of acceleration and
solve acceleration problems.
You’ll know you’ve got it when you can
• Accurately complete the problems & questions
Bell Work 3/25/14– 4 min
1. Define acceleration.
2. An object is traveling at 45.0 m/s. What does that
really mean?
3. An object is accelerating at 10.0 m/s/s. what does
that really mean?
Bell Work
1. Complete #1-9 on the worksheet!!! Woo woo!!!
Acceleration
• “the rate of change in the velocity of an object”
• 3 ways an object could accelerate?
• What 3 controls can cause a car to accelerate?
• All accelerations are caused by forces!
• Examples of acceleration?
What does acceleration really mean?
• A car is accelerating at 5.0 mi/hr/s.
Formula for Final Velocity
• Cheyenne is riding her bike at 2.0 mi/hr. If she accelerates
at 5.0 mi/hr/s for 4.0 s, how fast is she going?
Negative acceleration
• Negative displacement
– Means moved in the negative direction
• Negative velocity
– Means object is traveling in the negative direction
• Negative acceleration
– Means object is accelerating in the negative direction
– acceleration & velocity are in opposite directions, the
object is slowing down
“Acceleration”
• Can an object be “accelerating”, yet be slowing
down?
What does acceleration really mean?
• A ball is accelerating at -9.81 m/s2
Formula for acceleration
• Cheyenne is riding her bike at 2.0 mi/hr. If she accelerates
at 5.0 mi/hr/s for 4.0 s, what’s her acceleration?
Formula for acceleration solved for Vf (and everything else)
Only a & Vf formulas provided on test!
• Make equation with x and y in it & solve
Order of Operations!
• Make sure you put stuff in your calculator in
the correct order!
Practice Problems
Vo = 8.0 m/s
Vf = 20.0 m/s
t = 6.0 s
a = ? m/s2
Practice Problems
Vo = 5.0 m/s
Vf = ? m/s
t = 6.0 s
a = 3.0 m/s2
Practice Problems
Vo = ?
Vf = 42.0 mi/hr
t = 2.50 s
a = 4.00 mi/hr/s
Practice Problems
Vo = 15.0 mi/hr
Vf = 60.0 mi/hr
t=?
a = 4.0 mi/hr/s
Practice Problems
Vo = 30.0 m/s
Vf = ?
t = 5.00 s
a = -9.81 m/s2
Bell Work – do in notes!
1. Nick throws a ball into the air with a velocity of 30 m/s upwards.
Gravity causes the ball to accelerate 10 m/s2 downwards. How fast
is the ball going 2.5 s after he threw it?
2. What is the velocity 3 seconds after he threw it?
3. What is the velocity 5 seconds after the threw it?
4. What is the velocity 10 seconds after the threw it?
Today you are going to…take notes on and complete a
worksheet on acceleration.
So you can…develop an understanding of acceleration and
solve acceleration problems.
You’ll know you’ve got it when you can
• Accurately complete the problems & questions
Velocity (v) vs. Time (t) Graph
• Slope = ?
Any straight line  ?
Line curving up or down  ?
• To find velocity ?
• Area under curve = ?
Bell Work 4/2/13 – 6 min
Velocity (m/s)
1. Find the v and a of the object in the graph:
a.
b.
c.
d.
e.
2. W5SAYBoS
Bell Work 3/1/13 – 7 min
Use the factor label method to convert the following.
1. Brittany is walking when she decides to sprint down the
hallway. Starting at 3.00 mi/hr, she reaches a speed of
12.0 mi/hr in 2.0 seconds. Calculate her acceleration.
2. 9.81 m/s2 = ? ft/s2 (1 yd = 0.914 m, 1 yard = 3 ft)
Today you are going to…take notes on velocity graphs and
complete a velocity graph worksheet.
So you can…find the velocity and acceleration of an object
using a velocity graph.
You’ll know you’ve got it when you can
• Accurately complete the velocity graph worksheet.
24
20
16
12
Velocity (v) vs. Time (t) Graph
• To find velocity, just read the graph!
• Slope = acceleration
+ slope, + acceleration,
0 slope, 0 acceleration, (_________ speed)
- slope, - acceleration
Any straight line  constant acceleration
Line curving up or down  acceleration is changing
• Area under curve = displacement
24
20
16
12
Bell Work 3/31/14
• Take your velocity graph worksheets out
1. What is happening in each segment of this
Velocity vs time graph?
2. W5SAYWoS
Velocity Graph WKST #1
Car Acceleration Web Activity
Renault Clio 3.0 V6 255 - [2001]
0 to 60 mph time - 5.8 s
Car Acceleration Web Activity
Time (s)
Velocity (m/s)
Velocity vs. Time Graph
Velocity (m/s)
1. Find the velocity of the object in the graph:
a.
b.
c.
Bell Work 3/1/12 – 6 min
1. Find the v & a of the object in the graph at points:
B
C
D
A
Bell Work 3/2/11 – 6 min
Velocity (m/s)
1. Find the v and a of the object in the graph:
a.
b.
c.
d.
e.
Bell Work 2/24/12 – 6 minutes
Do this bell work on a separate sheet of paper. It will
be collected & graded when the timer sounds.
1. It takes Cam 6.5 minutes to run 1.0 mile. What is his
velocity?
2. Two days ago Courtney was walking the halls after school,
minding her own business. She heard a roaring behind
her, and turned to see Disha driving a car down the hall.
Courtney had been walking at a speed of 4.0 ft/s. She
quickly accelerated at a rate of 8.0 ft/s2 for 1.5 s. What
was Courtney’s final velocity? (identify all variables, write
the equation, circle your answer & include units.
Bell Work 3/5/12 – 5 minutes
1. It takes Cam 6.5 minutes to run 1.0 mile. What is his
velocity?
2. Sarah goes from a speed of 1.5 m/s to a speed of 6.0 m/s
in 3.0 s. What is her acceleration?
Graded Bellringer 11/7/14
1. From rest, a cow can reach a velocity of 15 m/s in 3.0 s. What
is the cow’s acceleration?
2. Kylie throws a water balloon downwards out of the window.
The balloon accelerates at 9.81 m/s2. After 5.00 seconds, the
balloon is traveling at 68.67 m/s. What was the initial velocity
of the balloon?
3. Emily is driving a car at 12.0 mi/hr. If she accelerates at 8.50
mi/hr/s, how many seconds will it take her to reach 65.5
mi/hr?
To study:
1.
2.
3.
4.
2.1 Measuring Motion Reading Guide
Displacement Graph Wkst 2
Velocity problems 1a
Acceleration wkst #1
Bell Work 2/27/12 – 7 minutes
1. Starting from rest, Luke rolls down a hill. If he
has a speed of 18.0 m/s after 4.0 seconds,
what is his acceleration?
2. Jamie is driving a go-cart. She is going 5.00
m/s when she decides to pass Marc. She
accelerates at 5.200 m/s2 for 2.000 s,
successfully leaving Mark in the dust. What
was Jamie’s final velocity?
3. W5SAYW
• Wednesday
– Quiz on velocity
Schedule
• Thursday
– Return quiz
– Finish Paper Airplane Lab
• Friday
– Airplane Lab Questions?
– Catapults
• Monday
– Acceleration
• Tuesday
– Acceleration
– Take home quiz
• Wednesday
– Acceleration Graphs
Bell Work 2/9/11 – 5 min
1. Solve for t.
280 = 20
t
2. It takes Stu, a slimy slug, 20 minutes to travel from
his favorite bush to the local trash can (a trip of 30
meters). If he traveled at the same speed, how far
would he travel in 60 minutes?
Bell Work 2/10/11 – 6 min
1. Solve for z.
10
20 =
z
3. It takes Emily A. 2 minutes to travel from history to
lunch (a trip of 200 meters). If she traveled at the
same speed, how far would she travel in 30
minutes?
4. Draw an inverted stick figure.
Bell Work 2/11/11 – 6 min
1. Solve for G. Show all 3 steps.
240
80 =
G
2. It takes Alec 3000 seconds to travel from the
cafeteria to Physical Science(a trip of 500 meters).
What was his average velocity?
3. If he traveled at the same speed, how far would he
go in 10 seconds?
Bell Work 2/14/11 – 6 min
Get your homework out. Don’t copy!
Make sure you clearly date your bell work!
1. If an object is traveling at 1600 m/s, how long will
it take it to travel 2000 meters?
2. W5SAYW
G – Finish Test!
Schedule
Students will be taking yesterday’s quiz if they haven’t
already
Others will be working on their final study guides. If
you have questions, ask!
Bell Work 2/16/11 – 6 min
1. Starting from rest (Vo = 0), a cow accelerates to 17
mi/hr in 8 seconds. What is her acceleration?
2. Find the velocity of the object in the graph:
a. 6 - 7 s
b. 7 - 12 s
c. 12 - 12.5 s
Bell Work 2/17/11 – 6 min
1. A cow is running at 17 mi/hr when she suddenly
hits a swamp. If it takes her 4 seconds to be halted
by the muck, what was her acceleration?
2. Find the velocity of the object in the graph:
a. 6 - 7 s
b. 7 - 12 s
c. 12 - 12.5 s
Bell Work 4/3/13 – 6 min
• Tuesday 4/2
– Review velocity worksheet & a couple graphs
– Complete study guide
• Wednesday
– Review study guide
• Thursday
– Test on 10.1 & 10.2 Velocity & Acceleration (includes 2 graphs)
– Study:
• 10.1 questions
• Acceleration Worksheet 1
• study guide (all other ch. 10 worksheets may be helpful)
• Friday
– Begin 10.3 Forces & Motion
Today you are going to…review the study guide & other
information on tomorrow’s test.
So you can…know exactly what to study for tomorrow’s test.
You’ll know you’ve got it when you can
• Accurately answer all questions on the worksheets.
c
b
d
f
a
e
g
h
Displacement (m)
1. Find the velocity
of the object in
the graph:
a. 0 - 5 s
b. 5 - 9 s
2. Find the
acceleration of the
object in the graph
From 0 – 5 s
3. W5SAYW
Velocity (m/s)
Bell Work 2/21/11 – 6 min
Time (s)
Will be collected!
Find the v & a
of the object in
the graph at
points A, B, & C.
Bell Work 5/23/12 – 4 min
• Objectives
– Review x vs. t & v vs. t graphs
– Review kinematic problems
– Begin reviewing forces, friction, & air resistance
• Schedule
– BW & Check HW
– Review schedule
– Review HW
– Start Study Guide II
– Return Tests
• Vinny is driving a go cart with a constant
speed of 35.0 m/s. How far will he travel in 40
seconds?
• It takes Megan 22.0 seconds to run 50.0
meters. What was her average velocity?*
• B-Shell fires an arrow at 300 feet per second.
How many feet did it travel after 0.25
seconds?*
• Starting from rest, Peterson reaches a speed
of 25 m/s in 4 seconds. What was her
acceleration?
• Carl throws a rock with a velocity of 20 m/s.
How many seconds will it take to travel 40
meters?*
• Alex runs down a hill. If he has an acceleration
of 6 m/s2 and his initial velocity was 2 m/s,
what is his velocity after 2 seconds?
Bell Work 2/23/11 – 6 min
1. Find the velocity
of the object in
the graph at:
a. 10 s
b. 20 s
2. Find the
acceleration of the
object in the graph
a. from 10 – 20 s
b. from 30 – 40 s
c. from 50-60 s
Bell Work 3/2/11 – 5 minutes
1. Natalie and Qinzhi are doing the marble lab.
Natalie releases the marble. Qinzhi starts the
timer when the marble hits the starting mark
and stops the timer when the marble hits the
40 cm mark. The timer reads 0.85 s. If the
starting mark was 15 cm in before the zero
mark, what was the average velocity of the
marble?
Bell Work 3/4/11 – 5 minutes
1. Kevin and B-Shell are doing the marble lab.
Kevin releases the marble. B-Shell starts the
timer when the marble hits the starting mark
and stops the timer when the marble hits the
60 cm mark. The timer reads 0.92 s. If the
starting mark was 5 cm in before the zero
mark, what was the average velocity of the
marble?
Marble Lab
• Make careful measurements!
• Stay focused on completing the lab. Only
interact with your lab partner.
Marble Lab – 50 Points!!
• Due by the end of class tomorrow.
• Tape ramp to wall.
– Don’t make it too steep!
– Make the part that you measured straight.
– Tape the end up so the marble doesn’t fall off.
• Time trials.
Marble Lab
• Create 2 graphs:
– Distance vs. Time (use average time)
– Velocity vs. Time (use average time)
• Plot both trials on each graph…use 2 different
colored to differentiate
• You must have a key!
Creating Graphs
•
•
•
•
•
•
Title at Top (y axis vs. x axis)
Lines and scales neatly drawn/written
Key (if applicable)
Axes labeled, including units
Axes scaled & frequently marked
Scale is consistent and easy to interpret using lines
on graph paper
• graph is made large enough to read
origin begins at 0,0 if appropriate
Bell Work 1/25/11 – 5 min
1. Calculate the speed of an object that covers
40 feet in 3 seconds.
2. Calculate the distance an object covers if it
has a speed of 55 km/hr and it travels for 7
hours.
3. Calculate the time it takes for an object with
a speed of 20 m/s g to travel 130 m.
Bell Work 1/27/11 – 5 min
1. What is the difference between speed and
velocity?
2. Give a situation where an object’s speed change
while velocity remains the same.
3. Dillon is sledding down the hill one fine day. If it
takes him 15 seconds to sled 63 meters, what was
his average speed?
4. One mile per hour is equal to 2.2 m/s. How fast
was Dillon traveling in miles per hour? (Use
dimensional analysis.)
Bell Work 1/28/11 – 5 min
A. The slope of a line is __ over __. What is the
equation for the slope of a displacement (x) vs.
time (t) graph? (same as equation for __)
Draw a separate displacement vs. time graph for each
of the following objects:
1.
2.
3.
4.
5.
An object with constant, positive velocity
A slower object with constant, positive velocity
An object with zero velocity
An object with negative velocity
A faster object with negative velocity
Bell Work 2/18/11 – 2 minutes
1. What is the equation for slope?
2. What is the average velocity of the object in
the graph below?