Question

what is limiting friction ? state the laws of limiting friction .

Answer 1

Answer:

Limiting friction:

• It is a the maximum opposing force comes into play when one object is just start the motion an another object.

Explanation:

Laws of limiting friction:

⇒ The magnitude of force of limiting friction (F) between the surface of two bodies is directly proportional to normal reaction (R) between them.

• F ∝ R
• F ∝ Mg
• R ∝ Mg

⇒ The force of limiting friction is independent of are of contact.

⇒ The force of limiting friction between any two surface is depends on nature of material of the surface and their state of polish.

⇒ Coefficient of friction: According to limiting friction F is directly proportional to R.

• F ∝ R    .........(1)
• F = μR
• μ = F/R

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