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

Determine hydraulic efficiency, A pelton wheel works at the foot of a dam b...

A pelton wheel works at the foot of a dam because of which the head available at the nozzle is 400m. The nozzle diameter is 160mm and the coefficient of velocity is 0.98. The diame

Simply supported beam, Simply Supported Beam: Simply Supported Beam: ...

Simply Supported Beam: Simply Supported Beam: The beam on which both ends are supported, either by point load or hinged or roller support.

Classification based on mode of welding, Classification Based on Mode of We...

Classification Based on Mode of Welding Manual welding: In this welding the entire welding operation is performed and controlled by hand. Here, there are two movements involv

Hydrostatic pressure on curved 3-d surfaces, (Hydrostatic pressure on curve...

(Hydrostatic pressure on curved 3-D surfaces) A shark tank in the aquarium has a hemispherical glass viewing "bubble"  jutting into the water from the side wall. The radius of

The center mark command, The Center Mark Command We can use  Center Mar...

The Center Mark Command We can use  Center Mark command to annotate a circle or an arc with a cross at the center.Illustration above shows a center mark added to a circle quick

Friction, Friction: you have learnt laws of friction and problems invo...

Friction: you have learnt laws of friction and problems involving dry friction. The relative sliding motion of one body on another body is resisted by forces called as frictio

Holonic manufacturing system, Holonic Manufacturing System Holonic manu...

Holonic Manufacturing System Holonic manufacturing implies a highly distributive organization of the manufacturing systems. Intelligence is distributed between the individual e

Shear force and bending moment, question no 2,page no 84 of strenght of mat...

question no 2,page no 84 of strenght of materials by G H Ryder

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