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SS1: PHYSICS – 1ST TERM

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  1. Introduction to Physics | Week 1
    4Topics
    |
    1 Quiz
  2. Measurement | Week 2
    3Topics
  3. Measurement of Mass | Week 3
    6Topics
    |
    1 Quiz
  4. Motion | Week 4
    5Topics
    |
    1 Quiz
  5. Velocity-Time Graph | Week 5
    4Topics
    |
    1 Quiz
  6. Causes of Motion | Week 6
    5Topics
    |
    1 Quiz
  7. Work, Energy & Power | Week 7
    3Topics
  8. Energy Transformation / Power | Week 8
    3Topics
    |
    1 Quiz
  9. Heat Energy | Week 9
    5Topics
    |
    1 Quiz
  10. Linear Expansion | Week 10
    6Topics
    |
    1 Quiz
Lesson 6, Topic 3
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Advantages & Disadvantages of Friction

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Advantages of Friction:

1. It protects us from sliding when walking.

2. It assists in the braking system of a car (to stop)

3. It helps in sharpening an object.

4. It also assists in grinding.

5. It assists in holding belts firmly in machines.

car braking
A car slows because of the friction between the brakes and the wheels.

Disadvantages of Friction:

1. It generates unwanted heat.

2. It causes wear and tear in moving parts of a machine.

3. It reduces the efficiency of a machine.

friction causes wear and tear
Friction causes wear & tear.

Ways of Reducing Friction:

1. By lubrication.

2. By smoothening.

3. By streamlining.

4. Use of ball bearing or rollers.

lubrication cropped Easy Resize.com
Lubricants Reduce Friction.
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