Friction class4

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=UbOSR5F7WZU

This video from Kriti Educational Videos explains about the friction. Here it explains the effects, properties, advantages and disadvantages. This video is suitable for class 4. • The video is communicated in English • Contents: • 1. Friction- introduction • 2. Properties of Friction • 3. Effects of Friction • 4. Advantages • 5. Disadvantages • 6. Methods of reducing friction • Video uploaded under permission from Kriti Prakashan Pvt Ltd, copyright with www.kritiprakashan.com. • 0:00 Introduction • 0:18 Properties of friction • 0:51 EFFECTS OF FRICTION • 1:02 Friction produces heat • 1:15 Friction causes wear and tear in a machine • 1:44 DISADVANTAGES OF FRICTION • 3:22 METHODS OF REDUCING FRICTION • 3:45 By using lubricants (grease, oil) • 4:01 By using ball bearings • 4:13 By using wheels or rollers on heavy suitcase • 4:28 By streamlining

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