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LESSON 8
8: U
8: U
NDERSTANDING
NDERSTANDING
D
D
ISPLACEMENT
ISPLACEMENT
www.knexeducation.com
ACTIVITY 3: WHICH SCRAMBLER SEATS TRAVEL FASTER?
PROCESS
Whole Class
1. Now that the students know how far seats on a small arm with a yellow Rod travel and how far
seats on a small arm with a red Rod travel, they can determine the speed that each travels using
the formula:
v=d/t
Where: v=velocity or speed
d= distance
t=time
In Groups
2. Ask students to predict which of the small arm seats will travel with the greatest speed and record
this prediction in their journals.
3. Students should then:
a. Activate the ride and determine the time it takes for the large arms to make one complete
revolution.
b. Use that time to calculate the speed of the seats attached to the smaller arms of two different
sizes using the formula below. This activity will require a separate calculation for the seats on
the small arm with the yellow Rod and another for the seats on the small arm with the red Rod.
speed =
distance traveled in the small circles on the small arms
time for one complete revolution of the large arms
4. Have students compare their predictions with the actual speeds they determined experimentally.
Whole Class
5. Students should:
a. Discuss their findings about the distances traveled by the seats on each of the small arms.
b. Discuss their findings about the speed of the seats. Did they predict accurately?
Why or why not?”
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