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

Heavy load supports, A number of heavy items are to be off-loaded from a He...

A number of heavy items are to be off-loaded from a Heavy-Lift Ship and placed on a series of "support assemblies" on the quayside to await transportation by road to their destinat

Alloy materials control, Q. Alloy materials control? All low alloy and ...

Q. Alloy materials control? All low alloy and high alloy equipment components including fittings, flanges and sections of pipe and all welds shall be individually tested by Ven

Find out the reactions at hinge, Find out the reactions at hinge: A bo...

Find out the reactions at hinge: A board ABCD is held in position as shown in Figure by a cable BE and a hinge at A. If the weight of the board is 5 kN, find out the reactions

Determine the water depth - standard step method, Consider a trapezoidal ch...

Consider a trapezoidal channel with a bottom width of 4 m, side slopes of 3:1 (H:V), and a bottom slope of 0.002 that carries 50 cms. The channel has a Manning's roughness of 0.034

Truss, Truss: What are truss? When can the trusses be rigid trusses? ...

Truss: What are truss? When can the trusses be rigid trusses? State the condition which is followed by simple truss? Sol.: A structure made up of several bars riveted o

Combustion chamber or clearance volume, Combustion Chamber ( or Clearance ...

Combustion Chamber ( or Clearance Volume ) : Combustion chamber is a space between the cylinder head and the piston top when the piston is at top dead center (TDC). The combustio

Evaluate the support required by body on plane, Evaluate the Support requir...

Evaluate the Support required by body on plane: A body having weight 50KN rests in limiting equilibrium on rough plane, whose slope is 30º. The plane is raised to a slope of

Determine forces in members of cantilever truss, Determine  forces in memb...

Determine  forces in members of cantilever truss: Determine  forces  in  members   B C   and  BD   of   cantilever truss  shown  in  the figure in the figure given below.

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