Question
Download Solution PDFThe friction experienced by the body when the body tends to move is known as:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Friction: Friction is an opposing force that comes into play when the body is actually moving (slide or roll) or even tries to move over the surface of another body.
- Static friction(Fs): the opposing force that is active when the body tends to move over the surface, but the actual motion is yet not started.
- Kinetic friction(Fk): kinetic or dynamic force is an opposing force that is active when the body is actually moving on another surface.
Kinetic friction is always slightly less than static friction.
- Fk < Fs
The unbalance force (P – Fk) produces acceleration.
- Fs ≤ μsN
- where μs is called the coefficient of static friction.
The magnitude of the kinetic friction force:
- Fk = μkN
- where μk is called the coefficient of kinetic friction.
The coefficients μs and μk do not depend on the surface area in contact but depend on the nature of the surfaces in contact.
The coefficient of kinetic friction is generally less than the coefficient of static friction.
Last updated on Jul 1, 2025
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