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

Gyroscope, what is principle of gyroscope

what is principle of gyroscope

Determine the greatest load carried by the composite springs, Determine the...

Determine the greatest load carried by the composite springs: A composite spring contain two close-coiled helical spring associated in series, each spring has 10 coils at a me

Resolving all of the forces normal to the inclined plane, Resolving all of ...

Resolving all of the forces normal to the inclined plane: A body weighing 500 N is resting on an inclined plane making an angle of 30 o with the horizontal. The coefficient o

Impulse turbine, IMPULS E TURBINE: The steam turbine in which the ste...

IMPULS E TURBINE: The steam turbine in which the steam expands while passing through nozzle and remains at the constant pressure over the blades is called as impulse turbine.

Determine the buckling load, (a) Evaluate the buckling load of column with ...

(a) Evaluate the buckling load of column with one end fixed other free of 8m length by using Euler's formula. Given : I min = 1390m 4 E = 2 X 10 5 N/mm 2 (b) Derive a

Design storage compounds for bulk solids, Q. Design Storage compounds for b...

Q. Design Storage compounds for bulk solids? Storage compounds for bulk solids, liquids and liquefied gases are normally included in a plant layout to provide short term storag

Give the expression for inductance., Q.   Give the expression for inductan...

Q.   Give the expression for inductance of a ? N ?    turn coil wound on a core having length I cross - sectional area A and magnetic permeability µ. Explain the significance of

Evaluate the acceleration of the three weights, Evaluate the acceleration o...

Evaluate the acceleration of the three weights: A system of weight connected by the string passing over pulleys A and B is shown in figure given below. Find out acceleration

Illustrate strip rolling, a) In strip rolling what is i) Forward slip ii) N...

a) In strip rolling what is i) Forward slip ii) Neutral point. Illustrate with diagram. b) State the conditions for rolling.

Hazard identification in plant layout, Risks associated with identified haz...

Risks associated with identified hazards can be reduced to a reasonable level through the application of good design principles that are focused on integrating safety into the over

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