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

Takt time for sand blasting, Takt Time for sand blasting:            ...

Takt Time for sand blasting:             Tatk time is crucial in manufacturing process. It determines the speed of production to produce a product. Time is money toward prod

Find out the recoil-velocity of the gun, Find out the recoil-velocity of th...

Find out the recoil-velocity of the gun: As shell of mass 200 gm is fired at a velocity of 50 metres/second by a gun of mass 20 kg. Find out the recoil-velocity of the gun.

Determine for water flow rate, A counter flow heat exchanger is used to coo...

A counter flow heat exchanger is used to cool 2000kg/hr of oil(Cp= 2.5 KJ/Kg K) from 105 o C to 30 o C by the use of water entering at 15 o C. If the overall heat transfer coeff

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).

Working of steam engine , Working of stream engine: The high pressure ...

Working of stream engine: The high pressure steam from boiler is supplied to the steam chest. The high pressure steam enters cylinder through inlet port and exerts pressure on

Machine design, how an axial thrust is a generated in a helical gear

how an axial thrust is a generated in a helical gear

What do you mean by flares and vents, Q. What do you mean by Flares and Ven...

Q. What do you mean by Flares and Vents? A vent is a potential gas fuel source and a potential liquid fuel source due to carry-over from the vent. This is also true for a flare

Calculate the thermal efficiency of the cycle, An engine uses air as the op...

An engine uses air as the operating substance. At the beginning of compression the pressure is 90 KN /m 2 and the temp. is 40 0 C. During the adiabatic compression, the volume is

FLUID MECHANICS, A mix of spherical particles of different sizes is to be s...

A mix of spherical particles of different sizes is to be separatedinto two size ranges by passing a liquid of density 1200 kg m-3 and viscosity 0.0015 Pa s upward through the mixtu

Calculate the torque, (a) Illustrate self-locking and self-energizing brake...

(a) Illustrate self-locking and self-energizing brakes. (b) The diameter of the drum is 250mm and the angle of contact is 90 o , If the operating force of 700 N is applied at th

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