Gears and chains, ropes and pulleys
From Algodoo
Gears and chains, ropes and pulleys
| Language: | English |
|---|---|
| Description: | Conversion between angular and linear motion and transmission of force and torque over distances is practical in many situations. This can be realized with gears, chains, rods, rope and pulleys. This lesson allows the student to construct both simple and compli- cated systems for converting motion and transmitting force. The technique is applied to realizing a mechanical machine designed by the students. |
| Target: | Key Stage 3, Key Stage 4 |
| Category: | Exercise, Laboratory |
| Discipline: | Static forces, Motion |
| Learning objectives: |
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| In class: | Discuss examples of systems that involves conversion between linear and rotational motion. Discuss systems that involves force transmission over short and long distances.
What forms of force transmission do you know of? What is the purpose of having gears? When are pulleys used? Let the students invent a mechanical device for some specific purpose that involves gears and chains or rope and pulleys - it might be a replica of some existing device or pure fantasy. Make a design for the device and build a simulation. Let the students evaluate the device with respect to the purpose of it. What modifications can be done. Let the students present their results. |
Steps in Algodoo
Create a scene
Explore the tools for making gears and chains - rope and pulleys. Make simple systems that transmit force and torque and convert between linear and rotational motion. Use a hinge motor to drive the system - or use the gravitational pull. Observe the effect on mo- tion and force of changing the gear size and number of pulleys
Design a system*
Create a mechanical device for some specific purpose that involves gears and chains or rope and pulleys. It might be a replica of some existing or historical device or pure fantasy.
- * Pure 2D has some restrictions. If you try to make a bicycle with chains and gears you may find that these collide with the wheels. The solution in Algodoo is to use different “collision layers” for different parts.
Run/interact
Run the simulation and interact with it.
Evaluate
Does the device operate as you planned? Can it be modified to be improved?
