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Knex 78890 - Education Amusement Park Experience Teachers Guide Manual

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LESSON 6
6:
6:
EXAMINING
EXAMINING
C
C
IRCULAR
IRCULAR
R
R
IDES
IDES
41
ACTIVITY 5: GEAR-UP OR GEAR-DOWN... FASTER OR SLOWER?
Am usement Par k Ex perienc e
Teacher’s Notes
• This activity can be undertaken as a class demonstration or you can have groups work collaboratively
with two versions of the model. One group should construct the geared–up version of the crank
driven ride and a second group should construct the geared-down version. They will need to switch
models once they have observed and thought about the model they have constructed.
• Your students may need a review of the concepts of gearing-up and gearing-down to be successful
with this activity.
PROCESS
Whole Class
1. Explain to the class that this activity, and the next, involves investigating how changing the
arrangement of the gears in the model impacts the ride.
2. Assign either the geared-up or the geared-down version of the model to each group. Once
completed, students should not turn the crank on their models.
In Groups
3. Students should:
a. Carefully observe each of the models without turning the cranks.
b. Predict which of the models will move faster when the cranks are turned at the same rate:
i) the model with the RED gear attached to the crank or
ii) the model with the BLUE gear attached to the crank.
c. In their journals, give reasons for their prediction.
Whole Class
4. Students should share their ideas about the relationship between the gear arrangement and the
speed of the Ferris Wheel/Boom Ride.
ACTIVITY 6: TURN THE CRANK
Teacher’s Notes
• Use either the hand crank driven Ferris Wheel OR Boom Ride for this activity.
• 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. Explain that this activity is an extension of Activity 5. Students will investigate how the different
gear arrangements affect the distance the ride travels. Ask students to suggest how they could
carry out this investigation. What measurements will they need to make? How will they record
their findings?
2. Suggest that groups pair up, as in Activity 5, so that the same model can be set up with different
gear arrangements.
… 43 …


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