Laws of solid friction, Mechanical Engineering

Assignment Help:

Laws of solid friction:

Sol.: The friction which exists between two surfaces that are not lubricated is called as solid friction. The two Surfaces can be at rest or one of the surfaces is moving and other surface is at rest. The following are laws of solid friction.

1. The force of friction acts in opposite direction in which the surface is having tendency to move.

2. The force of friction is equal to force applied to surfaces, so long as surface is at rest.

3. When surface is on point of motion, force of friction is highest and this maximum frictional force is called as limiting friction force.

4. The limiting frictional force bears constant ratio to the normal reaction between the two surfaces.

5. The limiting frictional force does not depend upon shape and areas of surfaces in contact.

6. The ratio between the limiting friction and normal reaction is a bit less when the two surfaces are in motion.

7. The force of friction is independent of velocity of sliding.

The above laws of solid friction are called as laws of static and dynamic friction or law of friction.

 


Related Discussions:- Laws of solid friction

Magnitude of the load - hollow cast iron cylinder, Magnitude of the load - ...

Magnitude of the load - hollow cast iron cylinder: Q: A hollow cast iron cylinder 4 m long, 300 mm is the outer diameter, and thickness of metal 50 mm is subjected to central

Chemical and physical delay, Illustrate the process of knock in C.I engines...

Illustrate the process of knock in C.I engines and compare it with S.I. engine knock. What is Octane rating of C.I. engine fuel. What is the difference between chemical delay and p

Stress concentrations, Describe the test specimens that were used in the te...

Describe the test specimens that were used in the testing program, and what one hopes to learn by testing them. Show the "test matrix" (i.e. a listing of what specimens made of wh

Melting point, What is melting point of aluminium?

What is melting point of aluminium?

Understanding the role of ownership, Understanding the Role of Ownership : ...

Understanding the Role of Ownership : Before starting a business, entrepreneur should know what is involved in owning a business and what are the roles one will have to play to st

Wire melting characteristics, WIRE MELTING CHARACTERISTICS A non linear r...

WIRE MELTING CHARACTERISTICS A non linear relationship exists between the rate at which the wire is fed into the arc and the current required to burn it off to maintain a constan

What is upr, What is UPR Novel architecture for complete CAD data excha...

What is UPR Novel architecture for complete CAD data exchange, called the Universal Product Representation (UPR).

Casting, can the superheat be in percentage?

can the superheat be in percentage?

Program evaluation and review techniques, Program Evaluation and Review Tec...

Program Evaluation and Review Techniques: The Rola and Cola Corporation is a professional II nursing home aspiring to become I nursing home. It desires to provide the ultimate

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd