Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 12


What are the different laws of friction?

11 years ago

Answers : (2)

askIITIians Expert
21 Points

Laws of Friction




1.         Laws of Static Friction


Static friction force is always equal and opposite to the net external force acting on the body.




2.         Laws of limiting friction


(i)         Limiting frictional force is independent of the apparent area of contact till the value of the normal reaction remains same.


(ii)        The direction of limiting frictional force is opposite to the direction in which one body is on the verge of starting its motion.


(iii)       The limiting frictional force depends upon the nature of surfaces in contact.


(iv)       Quantitatively, the magnitude of the force of limiting friction (F) on one of the two bodies in contact, is directly proportional to the normal reaction (R) on this body due to the other.


                        F µ R


            Or F = mR




            Where m is the constant of proportionally called coefficient of friction.



11 years ago
faizan khand
23 Points

the laws of friction are:

1) It always acts in the direction opposite to the tendency of relative motion b/w two bodies

2) Its magnitude can be any <UN

3) If we consider the rotational motion, then static friction opposes the direction of net force while kinetic opposes direction of relative motion

11 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

  • 101 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details