We started Lab #5: We bounced a golf ball or foam golf ball from one meter off multiple surfaces and recorded the number of bounces it took for the ball to come to rest. The students should be thinking about the number of bounces and the type of surface it is being bounced on. They should also be looking at how the bounces change with each impact.
I gave back the papers for Lab #3, as they are all now entered into the gradebook. A couple of classes also went through answers to the Transfer and Transform packets they were asked to do while I was away. The Quiz for B day students is this Friday, where the A day students will take it when I see them next week on TUESDAY. (The senior finals are altering our schedule a bit next week, so it is Tuesday).
Tuesday and Wednesday (14th/15th)
Students will come into class and look at data from Lab #5. They may or may not graph the data depending on time. We will discuss what we observed in the lab and the 14 surfaces. They will answer conclusion questions that will be turned in for a grade. Here they are...
1.
Looking at the data, it is clear that for some
surfaces the ball took more bounces before coming to rest than on other
surfaces. Which surfaces accepted the most energy per bounce? How do you know
this is true?
2.
Where do you think the energy went? (Transferred
or Transformed)
3.
What characteristics of the surface help
determine how much kinetic energy it can absorb? Why do some surfaces accept
more energy than others during each bounce?
We will then shift our focus to wrestlers and why they don't hurt themselves when they jump off the top ropes and onto the floor. Also Trampolines!
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