20. Video
From Mechanics
| Theory | Exercises | Video |
| Discs on a Turn Table | |
| Here four discs are placed on a turntable. The turntable starts to rotate and its angular speed is gradually increased. Explain why the discs begin to slide in the order shown in the clip.
http://www.youtube.com/watch?v=Oa9SD2sqgXQ
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| Angle of Friction Experiment | |
| The coefficient of friction for a body on an inclined plane can be found by looking for the angle at which the body is on the point of sliding down the slope. This experiment shows how the coefficient of friction between a calculator and a wooden plane can be found.
http://www.youtube.com/watch?v=3V6EhZY_dKo
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| Angle of Friction Second Experiment | |
| Here the coefficient of friction between a block and a plane is determined and then tested by using the angle of friction.
http://www.youtube.com/watch?v=z2q_Wymu0W4
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