Momentul inertiei
From Algodoo
Moment of Inertia
| Language: | English |
|---|---|
| Description: | This lesson is designed to help illustrate the concept of moments of inertia and how they affect the movement, or rotation, of an object. |
| Target: | Key Stage 4, Key Stage 5 |
| Category: | Laboratory |
| Discipline: | Motion, Momentum |
| Learning objectives: |
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| In class: | Discuss the conservation of energy and how it applies to an object rolling down a slope. They should be able to identify potential and kinetic energy. Challenge them to think of any other types of energy that might exist.
As students make predictions, lead them towards rotational motion if they are not already familiar with it. If students are, challenge them to ask what causes an object to have a large or small rotational energy. Discuss whatever ideas the students come up with. Once students have finished discussing their ideas, have them try it out for themselves by engaging this activity. |
Steps in Algodoo
CREATE A SCENE
Open the ‘Moment of inertia’ scene above.
MAKE A PREDICTION
Looking at the four objects, make a prediction of which object will roll down the slope the fastest.
RUN/INTERACT
Start the simulation by pressing the space bar. When ready, press the ‘q’ key to release the four objects. Watch the objects as they separate from each other. Stop the simulation when the objects start bouncing.
EVALUATE
Based on your observations, which object rolled the fastest?
Does this mean it had a high or low rotational energy value? Does this mean they have a high or low moment of inertia value?
REVISE SCENE
Press the back button to reset the scene. Create a box of any size and place it with the other objects. Right click on the box and go to ’materials->friction’ and set it to zero.
MAKE A PREDICTION
Make a prediction regarding how fast the box will slide down the slope in relation to the other four objects.
RUN/INTERACT
Press the ‘q’ key again to start the objects rolling down the slope. Why did the box finish the way it did? How does the law of conservation of energy help explain this?
