Ladder friction, Mechanical Engineering

Assignment Help:

Ladder friction:

.: A ladder is an arrangement which is used for climbing on the walls. It consists of two long uprights of wood or iron and connected by many cross bars. These cross bars are called as rungs and provide steps for climbing. The figure given below shows a ladder AB with its end A resting on ground and end B leaning against the wall. The ladder is acted upon by following set of forces:

 

1706_Ladder friction.png

(1)  Weight W acting downwards at the midpoint of it.

(2)  Normal reaction Rh and friction force Fh = µRh at end B leaning against wall. As the ladder has a tendency to slip downwards, friction force will be acting upwards. If the wall is smooth (µ = 0), friction force will be zero.

(3)  Normal reaction Ra and friction force FRa at end A resting on floor. As the ladder, upon slipping, tends to move away from wall, the direction of friction force will be towards wall.

By applying equilibrium conditions, the algebraic sum of horizontal component and vertical component of forces would be zero.


Related Discussions:- Ladder friction

Dismantle crank case and explode main shaft-gear complaints, Dismantle cran...

Dismantle crank case and explode main shaft , counter shaft, gear shifter drum and kick spindle assembly and check sequence of parts fitment while dismantling: Check all gear teeth

Determine the wire drawing - cold drawing processes, Determine the Wire Dra...

Determine the Wire Drawing - cold drawing processes Similar to above process bars are first pickled, washed and coated to prevent any oxidation. After this rods are passed t

TMA 2, A temperature control process has a first-order response with a step...

A temperature control process has a first-order response with a step response time of 12 seconds. In selecting a temperature sensor for the control system for the process, for what

Stenght of Material, Give the assumption of pure torsion derivation of shea...

Give the assumption of pure torsion derivation of shear stress produced in circular shaft subjected to torsion

Illustrate the specification of pddi, Illustrate the specification of PDDI ...

Illustrate the specification of PDDI (i)  The 3-D geometry of the product which is defined by a set of curves, surfaces and volumes. (ii) The topology which describes the se

Plastics-reinforced plastics and adhesives, Plastics, Reinforced Plastics A...

Plastics, Reinforced Plastics And Adhesives Introduction Organic materials particularly that occur in nature like wood and leather have been employed for engineering caus

What are the reasons behind poor pick-up of motor cycle, (a) Why does engin...

(a) Why does engine overheat and what will happen if engine overheats? (b) Why engine does not start in wet or damp weather? (c) What may be the causes if engine dose not sta

Calculate the force - pulley, Calculate the force - pulley: A string i...

Calculate the force - pulley: A string is passing over a smooth pulley. The string supports the mass m on one side which is to be pulled up with acceleration a. calculate the

Mechanical design of the blowdown systems, Q. Mechanical design of the blow...

Q. Mechanical design of the blowdown systems? Mechanical design of the blowdown systems shall be sized for a continuous blowdown of a minimum of 1.0% of MCR. Fabricator may re

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