Laws of solid friction, Mechanical Engineering

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.

 

Posted Date: 10/17/2012 6:23:49 AM | Location : United States







Related Discussions:- Laws of solid friction, Assignment Help, Ask Question on Laws of solid friction, Get Answer, Expert's Help, Laws of solid friction Discussions

Write discussion on Laws of solid friction
Your posts are moderated
Related Questions
Feces Collection: Small aliquots of feces are frequently analyzed to detect the presence of "hidden" blood, so called occult blood, which is recognized as one of the most ef

define elastomer.explain in details?

a) Mention typical application of instrument system with illustratation. b) Write down about the functional element of instrument system with examples. c) Define the key term

i wanna know is production job is best or marketing after doing btech

Polymerization Whether similar molecules join in long chain is termed as polymerization and resulting outcome is a polymer in a chemical reaction. Each plastic are polymers. T

Ask question #Minimum 1. Research the topic of heat loss in a cylindrical pipe. Explain which laws of physics are used to discuss heat loss in a pipe, and briefly explain how the f

Smallest value of constant horizontal force: A particle containing a mass of 8 kg starts from rest and attains a speed of 1.5 m/sec in a horizontal distance of 10 m. imagine a

In an engine working on Diesel cycle inlet pressure and tem are 1 bar and 17 o c respectively. Pressure at the end of adiabatic compression is 35 bar. He ratio of expansion i.e. af

Formula for maximum power transmitted by belt: Derive formula for maximum power transmitted by belt when centrifugal tension is considered. Sol: Let T 1  = Tension on

The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a cent