Introduction to mechanisms

1) The bicycle – Gears

Learn more about gears at this video and do the activities of the following worksheet

worksheet: The Bike – Mechanisms

2) How a mechanical watch works

Watch the video and then answer the questions in your notebook:

QUESTIONS:

  1. What are the five basic elements in a mechanical watch?
  2. What is the function of the mainspring?
  3. Which element transfers energy throughout the watch?
  4. What stops the wheels from spinning out of control?
  5. Where are the pallets located?
  6. Which element keeps the movement regular?
  7. Why is the time indicator important?

3) Time, clocks and gears

Watch the video and then answer the questions in your notebook:

QUESTIONS:

  1. What controls the rate of rotation?
  2. Why is it important to have the weight?
  3. Why are both small and large gears needed?
  4. The minute hand must rotate at ________ times the rate of the hour hand.

 4) Gears and wheels

Watch the video and then answer the questions in your notebook:

QUESTIONS:

  1. Teeth from the clockwise turning gear push ________ on the teeth of the meshing gear on the right, causing it to turn counterclockwise.
  2. How can we measure the size of a gear?
  3. Give an example of a power source.
  4. Which gear turns faster—the driver gear or the driven gear? Why?
  5. Why is it important not to use more gears than necessary?
  6. What is the gear ratio for the compound gear train?
  7. Name 4 items that are made with wheels.

 

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Some videos to introduce TPR to 3ºESO students

Some videos to introduce what this subject is about. I hope you enjoy them!!

Yes!! We will work a lot with ELECTRICITY AND ELECTRICAL CIRCUITS!

(Here you have some great explanations of what’s going on in the video: These friends are electric!).

Beware of ELECTRONICS!!!

Remember: PROGRAMMING is frustrating sometimes!

ROBOTICS will make our life easier… won’t them?

Combine everything in interesting PROJECTS…

… taking SAFETY precautions not to die in a dumb way!!