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

What is a steam turbine diaphragm, Steam turbine comprises of stages, numbe...

Steam turbine comprises of stages, number and size of the stages depends upon the break horsepower of the turbine. The stage has set of moving and fixed blades. The moving blade

Shear stress, At apoint in apiece of elastic materialdirect stress of90mega...

At apoint in apiece of elastic materialdirect stress of90meganewton permeter square tensile and 50 mega newton per meter sqare compressive applied on mutually perpedicular planes.d

Calculate the angular acceleration of the pulleys, Calculate the angular ac...

Calculate the angular acceleration of the pulleys: The compound pulley system has a mass of 30 kg and a radius of gyration of 450 mm. Calculate the tension in each cord and th

Crankshaft design, i have designed a crankshaft for 3 cylinder engine i wan...

i have designed a crankshaft for 3 cylinder engine i want to know how to balance it

Show construction subcontractor responsibilities, Q. Show Construction Subc...

Q. Show Construction Subcontractor Responsibilities? The Supplier or Construction Subcontractor is responsible for: • Employing qualified PMI technicians • Performing PMI

Structures of materials, what is the difference between atomic structure an...

what is the difference between atomic structure and crystal structure

What do you understand by steering gear mechanism, (a) Illustrate what do y...

(a) Illustrate what do you understand by Steering Gear Mechanism ? Describe any one Steering Gear Mechanism. (b) Write short note on Pantograph.

Why we use nickel alloys in welding, Q. Why we use Nickel Alloys in welding...

Q. Why we use Nickel Alloys in welding? Nickel weld metals have high creep-rupture strength but often have lower stress-rupture ductility and lower mechanical and thermal fatig

Enthalpy - thermodynamics, Enthalpy: Sol: The enthalpy is total ener...

Enthalpy: Sol: The enthalpy is total energy of gaseous system. It takes into consideration, internal energy and pressure, volume effect. Thus, it can be defined as follows:

MOTORSPORT VEHICLE CONSTRUCTION, MODIFICATIONS REQUIRE FOR A ROAD CAR TO EN...

MODIFICATIONS REQUIRE FOR A ROAD CAR TO ENTER A HILL CLIMB

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