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What is Friction ? Give the its types. |
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Answer» Whenever a body moves or tends to move over the surface of another body, a force comes into play which acts parallel to the surface of contact and opposes the relative motion. This opposing force is called friction. Types : Static friction: The force of friction which comes into play between two bodies before one body actually starts moving over the other is called static friction (fs). Static friction is a self-adjusting force. Limiting friction: The maximum force of static friction which comes into pay when a body just starts moving over the surface of another body is called limiting friction. Kinetic friction: The force of friction which comes into play when a body is in steady motion over the surface of another body is called kinetic or dynamic friction (fk) kinetic friction is less than limiting friction. |
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