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For each of the following 5 scenarios,
There is a set of questions to answer prior to experimentation.
All materials needed to physically experiment with the scenario are supplied.
If you would like to extend or experiment with additional materials please do not hesitate to ask for more equipment.
For each of the scenarios, you may want to create FBD's to help yourself and partners to explain your observations.
Your sole responsibility is to leave with the following understandings:
How can I use FBD's to support my arguments?
When using On...By... notation, am I identifying the appropriate objects?
Can I use scientific reasoning to overcome some of the deeply held beliefs that I entered the room with?
Our Labels may vary but the ON... BY ... Notation is excellent!
Scenario 5: Launched Marbles:
Scenario 5: Launched Marbles:
Two marbles of masses M_1 and M_2 (M_1>M_2) are moving under the action of gravity, starting from the same height as shown. The mass M_1 is given an initial velocity in the horizontal direction while M_2 is released from rest.
Prior to experimentation, please complete the following: Which lands first?
Suppose the marbles take at least 3 seconds to fall to the ground after release. Create an FBD for each of the marbles at t = 1s.
Describe the changes in the y-velocity and y-position of each marble as they fall to the ground.
Reasoning through Misconceptions:
Identify student misconceptions, have them commit to an answer and preferably provide a rationale for their response. Identifying possible multiple choices distractors is determined by interviewing students initial rationale.
Provide opportunity / forum for students to confront their misconceptions. These opportunities must be constructed to allow for students to extend their understanding beyond the initial, 'contrived' scenario. It is important to understand that their initial view is incorrect
New paradigm must be supported using scientifically sound reasoning. The role of the teacher is to help the students to reason through these new thought processes.
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