Pendulums Experiment-ReportMathematics
This Project Will Be Due By
September 30th.
A Pendulum
Group Members and Jobs
• Each member of your group needs to have a
specific job. The Job Titles are:
• Leader
• Scribe
• Engineer
• Technician/Mathematician
Leader
• It will be the leaders job to
keep the group working
toward the goal of completing
the project on time. The
leader will also need to assist
the other members of the
group in their jobs so it’s
important the leader be good
at all jobs.
Scribe
• The scribe is the writer and
artist of the group. The scribe
need to have excellent
handwriting and some
drawing skill. The scribe will
be responsible for writing the
information in the packet,
plotting the data on the
graphs and keeping the
packet in great condition.
Engineer
• Engineers design materials,
structures, and systems
while considering the
limitations imposed by
practicality. The engineer
will be responsible for
building and maintaining
the pendulum stand.
Mathematician
• The mathematician will
make measurements and
assure that careful
collection of data
happens. They will also
be timekeeper and assist
the scribe with graphing.
Steps 1-3
• 1) Write the names of the members of your
group on the cover. I would like you to get a
binder folder for the finished report ASAP.
• 2) Read Swinging Through History article as a
group.
• 3) Copy the Driving Question on the board as
your Problem Statement.
Steps 4-6
• 4) Answer the questions about pendulums, constants
and variables. (Use scratch paper to create a great
answer before marking in your Lab Manual.)
• 5) Build your tower and experiment with the swinging
pendulum a few times.
• 6) Write a hypothesis for each of the variables you
have defined.
Hypotheses
• Your hypotheses need to be IfThen statements
that connect the manipulated variables to the
responding variables.
• Look on the three graphs, on the X and Y axes, to
determine what your manipulating and
responding variables are. Remember DRY MIX.
Hypotheses
• Look at the first graph! What is on the X axis?
• Length of swinger. So which variable is that?
• X axis (DRY MIX) X is the?
• Manipulating Variable!
• What is on the Y axis?
• Number of swings in 15 seconds. So which Variable is
that? (DRY MIX)
Hypotheses
• Y axis is the responding variable.
• So now write a hypothesis connecting these two
variables.
• IF I increase/decrease the length of the string THEN
the number of swings will increase/decrease.
• Repeat this process for the other two variables on the
other 2 graphs.
Procedure
• By the way, what is the responding variable in
all three experiments?
• Number of swings in 15 seconds.
• Now, using those three hypotheses, write a
procedure to explain how you will test these
three variables.
We Must Progress!!!!
•Progress reports will be
due sooner than you
think.
Procedure
• Step 1: Build the pendulum tower. I don’t need a
detailed list of steps on building the tower, just
build it. I really want you to define which variable
you will be manipulating, which ones you will be
controlling (not changing), and which one you
will be observing. (Responding)
Procedure
• Step 1: Assemble the pendulum tower.
• Step 2: The first experiment will MEASURE
(quantitative) how the starting height affects the
number of swings in 15 seconds. We will change
(manipulate) the starting height, control (don’t
change) the number of washers and the length of the
string. We will count the number of swings in 15
seconds. (Responding)
Procedure
• Now write steps 3 & 4 using the same format
but for the other 2 variables.
Procedure One
• Change the starting height of the swinger and
count the number of swings in 15 seconds.
• Use 15˚-30˚-45˚-60˚ and 75˚
• Count the swings and plot on your graph.
• Remember to control the other variables.
• This should be FINISHED TODAY!!!!!
Procedure Two
• Change the Mass of the swinger and count the
number of swings in 15 seconds.
• Use 3-5-7-9 washers
• Count the swings and plot on your graph.
• Remember to control the other variables.
• This should be FINISHED TODAY!!!!!
Procedure One
• Measure the length of the string and count the
number of swings in 15 seconds.
• Record this on your graph.
• Repeat for 20-40-60-80 and 100 cm.
• Remember to keep the other variables controlled!
• Draw the line.