PHYSICS
MONDAY
Warm Up-What is the average acceleration of a falling object that goes from 0 to -39.2 m/s in 4s? What type of motion
is this?
Assignment:
Freefall and the Acceleration of Gravity
Directions:
1. Find the acceleration of gravity reading at
http://www.glenbrook.k12.il.us/gbssci/Phys/Class/1DKin/U1L5b.html.
2. After reading the article, answer the following questions in your NOTEBOOK!
Questions:
1.
2.
3.
4.
5.
6.
7.
8.
9.
What is the only influence that objects in freefall are under?
What are the two numerical values used for the acceleration of all objects in freefall?
What is the letter used to represent the acceleration of gravity?
What is the equation used for acceleration? See hint for #7 if you need help.
Plug in ‘g’ for Δv in the above equation (your answer for #4) and plug in 0-10 seconds for the time to
complete the VELOCITY column in the data table below. Don’t worry about the acceleration column yet. The
first few are done for you:
Time (s)
Velocity (m/s)
Acceleration (m/s/s)
0
0
0
1
-9.8
-9.8
2
-19.6
-9.8
3
4
5
6
7
8
9
10
Graph the above data in a VELOCITY over TIME graph. Plot time (s) on the x-axis and velocity (m/s) on the yaxis.
Plug in the acceleration data into your data table for #5. Hint-The acceleration (a=Δv/Δt) should be constant
and equal to the acceleration of gravity. The first two are done for you.
Graph the above data in an ACCELERATION over TIME graph. Plot time (s) on the x-axis and acceleration
(m/s/s) on the y-axis.
Look at your two graphs (from #6 and #8). Even though they represent the motion of the same object they
are different. How are they different?
Kinematic Equations
Directions
1. Find the kinematic equations reading at
http://www.glenbrook.k12.il.us/gbssci/Phys/Class/1DKin/U1L6a.html.
2. Find the kinematic equation problems at
http://www.glenbrook.k12.il.us/gbssci/Phys/Class/1DKin/U1L6d.html.
3. After reading the article, complete sample problems 1-20. Whatever you don’t finish today is homework.
HW: Complete sample problems 1-20
TUESDAY
Warm Up: Drop a pen or pencil from a level equal to your height to the floor. Time how long it took from being dropped
until it hit the floor. Record the time in seconds. Then, using the kinematic equation you learned yesterday,
, plug in the initial velocity (hint-0), time (whatever you measured in seconds), and acceleration of
gravity (9.8 m/s/s). What was the displacement (d) of the pencil/pen? This should be equal to your height in meters!
To check, measure your height in meters using a tape measure from the lab cart. Record your height (m). How does
your measured height compare to your calculated height? What are some reasons they may have been different?
Assignment:
Projectile Motion:
Directions
1. Find the projectile motion reading at http://www.glenbrook.k12.il.us/gbssci/Phys/Class/vectors/u3l2a.html.
2. Complete the questions below.
Questions:
1. What is a projectile?
2. Give three real life examples of projectiles. Draw pictures with your examples.
3. What is the ONLY force acting upon a projectile?
4. What concept do many students have trouble with in their understanding of projectile motion?
5. How would a cannonball shot parallel to the ground travel if there were no gravity? How does it travel when
there is gravity? Draw pictures to show the difference.
6. Suppose you throw a football to your sibling who is 10 meters from you.
a. Is the football an example of a projectile?
b. Draw the above situation.
c. Include VELOCITY vectors in your drawing. See the sample below for help:
HW: Read Types of forces at http://gbs.glenbrook.k12.il.us/Academics/gbssci/phys/Class/newtlaws/u2l2b.html
and complete the following questions:
1. What is a force?
2.
3.
4.
5.
6.
7.
What are the two main types of forces?
List the six contact forces along with their symbols and brief descriptions.
List the three action at a distance forces along with their symbols and brief descriptions.
What is the difference between mass and weight?
What is the difference between sliding and static friction?
Complete the two check your understanding questions.
WEDNESDAY:
Warm Up: Name three forces you have experienced so far today. Give your estimate as to the value of each one in
Newtons. Remember that one Newton is equal to the weight of a grapefruit.
Assignment:
Reaction Time Lab
1. Period 1-Jocelyn and Jeffrey check out the computers. Period 2-Eveling and Dario check out the computers.
Get the key from Ms. De Leon and get the computers from the academy space.
2. Download the Reaction Time Lab from the Unit 2 webpage under documents, under hands-on labs.
3. Click on the ‘data’ tab.
4. Get a ruler from the lab cart.
5. Have your partner hold a ruler vertically above your hand with the zero centimeter mark directly above your
outstretched hand.
6. Hold your hand so that you are ready to catch the ruler as soon as your partner releases it. The goal is to
catch the ruler between your fingers and your thumb as soon as it is released.
7. Have your partner release the ruler without telling you and record the distance before caught in the data
table on the spreadsheet under control for trial 1. Repeat this two more times and record each trial under
control in the data table. Record the calculated reaction time in your notebook. Who had the fastest
reaction time?
8. Now try the same experiment under different conditions. Try some of the suggestions listed on the
spreadsheet and record your data in your notebook.
9. What forces were acting on the ruler?
10. Period 1-Jocelyn and Jeffrey check in the computers 10 minutes before class ends. Period 2-Eveling and
Dario check in the computers 10 minutes before class ends.
Homework: Complete Minds on Physics Module #4 under the category Newton’s Laws. Go to
http://www.glenbrook.k12.il.us/gbssci/Phys/mop/module.html, log in, click on Newton’s Laws, click on module #4-types
of forces. Remember to save your completion code unit Mr. S. gets back!
THURSDAY:
Warm Up: Name three different forces you have experienced today (they cannot be the same that you listed yesterday).
Give your estimate as to the value of each one in Newtons. Remember that one Newton is equal to the weight of a
grapefruit.
Assignment:
1. Period 1-Ariella and Victor check out the computers. Period 2-John and Vanessa check out the computers. Get
the key from Ms. De Leon and get the computers from the academy space.
2. Go to the Projectile Simulator activity at
http://gbs.glenbrook.k12.il.us/Academics/gbssci/phys/shwave/projdirns.html.
3. Complete all of the questions based on the simulation.
4. If the school computers will not run the lab try this one at
http://phet.colorado.edu/simulations/sims.php?sim=Projectile_Motion.
5. Period 1-Ariella and Victor check in the computers 10 minutes before the period ends. Period 2-John and
Vanessa check in the computers 10 minutes before the period ends.
Homework: Complete Minds on Physics Module #6 under Newton’s laws of motion. Go to
http://www.glenbrook.k12.il.us/gbssci/Phys/mop/module.html. Sign on, select Newton’s laws under modules, click go,
select sublevel #6-mass vs. weight. Remember to save your completion code until Mr. S. comes back!
THINGS THAT ARE DUE ON OCTOBER 20th WHEN MR S. GETS BACK:
All assignments and homework in your notebook and the two
completion codes!