Question
An inflated tyre rolls easily than a flat tyre.
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Answer
- When the tyre is inflated, the pressure inside the tyre is reducing the normal force between tyre and the ground, and thus reducing the friction between the tyre and the road.
- When the tyre gets deflated, it gets deformed during rolling, the supplied energy is used up in changing the shape and not overcoming the friction, and thus due to deformation, friction increases.
Hence, an inflated tyre rolls easily than a flat tyre.
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