We have been studying variables in science, controlling different variables in bouncing balls and swinging pendulums. As part of our experiments we hung and old twelve-pound bowling ball from Russ and Dana K. from a second story window at Susan Lindgren. We've found out that release angle and pendulum mass do not effect the swing rate, but the pendulum arm lenght does. The bowling ball swings at a rate of 2.6 cycles in 15 seconds, our 200 centimeter pendulums swing at a rate of 5 cycles in 15 seconds, and a 10 centimeter pendulums swings at a rate of 24 cycles in 15 seconds. See the bowling ball pendulum movies below.
Bowling Ball Pendulum
(wmv file)
This time lapse of a Bowling Ball Pendulum with a pendulum arm length from the top floor of Susan Lindgren is made from 180 pictures stitched together. It shows 60 seconds of swinging in 20 seconds.
Bowling Ball Pendulum 2
(wmv file)
This time lapse of a Bowling Ball Pendulum with a pendulum arm length from the top floor of Susan Lindgren is made from 180 pictures stitched together. It shows 60 seconds of swinging in 60 seconds.
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Welcome to the TRECK Classroom! St. Louis Park Susan Lindgren Intermediate School 4801 West 41st Street St. Louis Park
