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Knex 78890 - Education Amusement Park Experience Teachers Guide Manual

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LESSON 6
6: E
6: E
XAMINING
XAMINING
C
C
IRCULAR
IRCULAR
R
R
IDES
IDES
35
b. As you gather assessment data during your discussions with students and observations of their
e
xperiments, it is suggested that you reward groups who:
i) Propose and carry out multiple trials.
ii) Collect data related to the empty Ferris Wheel/Boom Ride as well as the loaded
Ferris Wheel/Boom Ride
iii) Test more than one mass - possibly they will complete one experiment with a single mass
on each seat and a second experiment to test two masses on each seat.
iv) Quantify the speed of the ride rather than commenting on the fact that the ride seemed to
speed up or slow down.
5. Observations should be recorded in science journals and students should respond to the following:
a. Did the ride speed up or slow down when the masses were added to the seats?
b. What data or observations did you note that prove your statement?
Whole Class
6. Students will discuss their findings with respect to:
a. What happened to the ride when mass was added to the seats.
b. Why?
ACTIVITY 2: SLOWING DOWN WITH WEIGHT - PART II
Am usement Par k Ex perienc e
Teacher’s Notes
• The circular path followed by the seat is the same as the path traced out by the end of one of the
arms. This information will help students calculate the circumference of the circle.
PROCESS
Whole Class
1. Teachers may want to frame this activity as follows: “We have discussed the experiments you used
to show that the ride slowed down when mass was added to the seat. Our challenge now is to find
a way to calculate by how much the speed is reduced.”
Teacher’s Notes
• Some students may have described the change in speed in Activity #1 using the unit rpm. Rotational
motion can be quantified in several ways. In Activity #2 students will explore another technique to
determine how much the ride slows.
In Groups
2. Ask the students to:
a. Determine the circular distance traveled by one of the seats during one revolution. (Students
may need the formula for circumference: C = 2πr)
b. Determine the time that it takes for the ride to complete five revolutions. (Remember, complete
multiple trials and average the results to arrive at your value for time.)
… 37 …


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