What is your personal experience with swinging on anything like a trapeze? I've been on a swing, one you sit in, and I've used zip lines (which isn't exactly the same thing). When I was younger, we had a trapeze bar on our swingset. I've also been around construction sites and think of pendulums when I see wrecking balls and sometimes even cranes. We also had a rope swing when I was younger. What application to "Real life" do swingng objects have? I mentioned above the use of wrecking balls and cranes in construction. They're also used for entertainment purposes, in the circus, or for swinging, or gymnastics. Pendulums are used in some clocks. What is your prediction about what will happen if two people are on one trapeze and only one is on the other and they are both let go at the same time? Explain. Since pendulums on earth depend on gravity, and weight is also a factor of gravity, the heavy pendulum will ossillate longer, but not any faster. They will fall at the same rate, but the heavier will swing longer because the additional weight will create less resistance to slow the pendulum. What understanding or ideas do you have about the science of back and forth swinging objects? I know it has to do with mass of bob (end object), length of pendulum string, the angle of the starting point and outside factors that may be present (such as wind). I don't know the mathematics of it. Prediction: The pendulum will swing the same number of time if the time is restricted. Since one washer makes 9 swings in 10 seconds, 2, 3, and 4 washers will also make 9 swings in 10 seconds. Additional questions raised: 1. Is my prediction that the heavier pendulum will swing for a longer amount of time before gravity brings it back to rest correct? (ie - does weight affect how long a pendulum will oscillate?) 2. If we drop the weight from a larger angle, will it have the same number of oscillations in 10 seconds? 3. How many oscillations will it make if we double the length of the pendulum rope?
DAY 2: Investigation:
QUESTION: Will using two strings to hold the metal washer instead of one string change the number of swings made by the metal washer? Why did you choose that question?
v We chose this question because we are curious about experiment and the potential results for personal reasons. We are all fond of our childhood swinging experiences, which makes the question relevant to us. We are curious to see if it would have made any difference if we swung on a swing with one string or two strings.
Why is it important or interesting?
v This is important because it is relevant to us. Some of us primarily swung on single string swings, while others primarily played on double string swings. It will be interesting to discover whether or not our actively childhood swinging experiences were similar (if there is not difference) or different (if one proves to swing more than the other).
Refine the question into one that is testable by investigation. (HOW not WHY)
v How will two strings effective the number of swings a metal washer makes at a 22 ½ angle for 10 seconds? 2 metal washers? 3 metal washers? 4 metal washers? How does it compare to the experiment using only one string?
INVESTIGATE:
What claims can you make related to your question and what evidence supports those claims?
v There is not a significant difference in whether a swing has two strings or one string and our evidence is that the mean number of swings for each weight is about 9. These numbers are very similar to the evidence we found Tuesday when using only on string.
In-class quiz: The swinging would be awkward because as we just dicusssed that length of the string makes a difference in how a pendulum swings, so having one long string and one short string would make the swing move faster on one side.
DAY 2: Investigation:
QUESTION: Will using two strings to hold the metal washer instead of one string change the number of swings made by the metal washer? Why did you choose that question?
v We chose this question because we are curious about experiment and the potential results for personal reasons. We are all fond of our childhood swinging experiences, which makes the question relevant to us. We are curious to see if it would have made any difference if we swung on a swing with one string or two strings.
Why is it important or interesting?
v This is important because it is relevant to us. Some of us primarily swung on single string swings, while others primarily played on double string swings. It will be interesting to discover whether or not our actively childhood swinging experiences were similar (if there is not difference) or different (if one proves to swing more than the other).
Refine the question into one that is testable by investigation. (HOW not WHY)
v How will two strings effective the number of swings a metal washer makes at a 22 ½ angle for 10 seconds? 2 metal washers? 3 metal washers? 4 metal washers? How does it compare to the experiment using only one string?
INVESTIGATE:
v There is not a significant difference in whether a swing has two strings or one string and our evidence is that the mean number of swings for each weight is about 9. These numbers are very similar to the evidence we found Tuesday when using only on string.
In-class quiz: The swinging would be awkward because as we just dicusssed that length of the string makes a difference in how a pendulum swings, so having one long string and one short string would make the swing move faster on one side.
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