| 11. | As stated earlier, the friction force acts in a direction opposite the motion of the block.
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| 12. | Figure a ) depicts the model, figure b ) the equation of motion with unknown friction force
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| 13. | The friction force is then caught by the stopper ( Black trapezoid ) mounted on the brake shield.
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| 14. | This leads to a great reduction in average friction force, explaining why such solids have a lubricant effect.
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| 15. | This provides a buoyancy force, " lifting " the glacier from the bed and reducing the friction force.
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| 16. | :: There is a fifth force on the container-the vertical friction force exerted by the wall.
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| 17. | These friction forces add up to a very large force ( all in accordance with the standard formula ).
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| 18. | These coefficients describe the two types of friction forces in terms of the reaction forces acting on the bodies.
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| 19. | If we suddenly cut the voltage, the friction force will still be there, slowing down the current.
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| 20. | At this point, the device relied upon the friction force between the cards to achieve some kind of randomness.
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