Example of wedge friction, Mechanical Engineering

Assignment Help:

Example of Wedge friction:

Two blocks A and B are employed to raise load of 2000 N resting on another block C by the application of force P as shown in the figure given below. Neglecting weights of wedge blocks and assuming co efficient of friction µ = 0.25 for all surfaces, determine value of P for impending upward motion of block C.

Sol.: The block C, under action of forces P on blocks A and B, tends to move upward. Thus the frictional forces will act downward. 

tanφ= µ = 0.25 (given),

 

87_Example of Wedge friction.png

 

where φ is angle of friction φ= 14°

Consider equilibrium of block C :

1630_Example of Wedge friction1.png

635_Example of Wedge friction2.png

It is acted upon by following forces :
(i) Load 2000 N,

(ii) Total reaction RA offered by the wedge block A, and (iii) Total reaction RB  offered by the wedge block B. By using Lami's theorem, we obtain

Consider equilibrium of block A:

It is acted upon by the following forces: (i) Force P,

(ii) RA  (from block C), and

(iii) Total reaction R that isoffered by horizontal surface.

1160_Example of Wedge friction3.png

Using Lami’s theorem, we have

529_Example of Wedge friction4.png


Related Discussions:- Example of wedge friction

Question.., Two concentric perforared plates are seperated by a 200mm laund...

Two concentric perforared plates are seperated by a 200mm launder and form the flow exit for a clarifier (figure 1). The inlet water flow of 1200 mcubed/hour into the clarifier is

The baseline dimension command, The Baseline Dimension Command You can ...

The Baseline Dimension Command You can use this command to generate a series of dimensions from a single base point. You must already have created the first dimension in the se

Need for electron beam welding(ebw) process, NEED FOR ELECTRON BEAM WELDING...

NEED FOR ELECTRON BEAM WELDING(EBW) PROCESS   The major advantage resulting from the use of a vacuum environment with a working pressure of from 10 -5 to 10 -3 mbar is esp

Gear wheel mechanism, I want to tranfer the rotatory motion of my apache RT...

I want to tranfer the rotatory motion of my apache RTR 160 back wheel to a motor(of dynamo). kindly guide me with the design. i''m struck up in the gear wheel mechanism.

Airport pavement, Airport Pavement: Airport pavements can be: (a) ...

Airport Pavement: Airport pavements can be: (a)        Flexible, and (b)       Rigid (cement concrete). Since cement concrete pavements have transverse and longitudi

Petrol-general safety tips , Petrol: Work in a well-ventilated area. Keep ...

Petrol: Work in a well-ventilated area. Keep flames or sparks away from the work area or where petrol is stored.

Movement of wire at the signal box, Movement of wire at the signal box: ...

Movement of wire at the signal box: The wire working on railway signal is 5mm in diameter and 300m long. If movement at the signal end is to be 25cm, make calculations for mo

Calculate the internal pressure to cause first yield, A large hydraulic cyl...

A large hydraulic cylinder is to be treated using autofrettage, taking 80% of the wall thickness into the plastic range. The external diameter of the vessel is 200mm and the inter

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