Equation of motion of lift, Mechanical Engineering

Assignment Help:

Equation of motion of lift:

Write equation of motion of lift when move up and when move down 

Assume,

 

1790_Equation of motion of lift.png

W = Weight carried by lift m = Mass carried by lift = W/g
a = Uniform acceleration

T = Tension in cable supporting lift, also called as Reaction of the lift

For UP MOTION

Net force in upward direction = T-W Also Net Force = m.a

That is        T-W = m.a                                                                                                                                       ...(i) FOR DOWN MOTION

Net force = W - T

Also Net Force = m.a That is

W - T = m.a                                                                                                                                     ...(ii)

Note: Wave taken weight or mass carried by lift only. We have assumed that weight carried by lift includes weight of lift also. But sometimes example contains weight of the lift and weight carried by lift separately. The weight carried by the lift or weight of the operator etc, will exert pressure on the floor of the lift. Whereas tension in cable will be given by algebraic sum of the weight of the lift and weight carried by lift.


Related Discussions:- Equation of motion of lift

#thermodynamics., #A spherical aluminum vessel has an inside diameter of 30...

#A spherical aluminum vessel has an inside diameter of 30 cm and contains water at 80 ?C, with a quality of 1%. The vessel is then heated until the water inside is saturated vapor.

Heat treatment, #question.what are process of annealing? .

#question.what are process of annealing? .

Torque of multiple and different sized fasteners service tip, Torque of Mul...

Torque of Multiple and Different Sized Fasteners: First tighten all fasteners by the help of free hand. Then torque big fasteners first followed by torque of smaller fasteners in

Dryness Friction Value, Why dryness fraction are importance for steam power...

Why dryness fraction are importance for steam power plant in terms of safety and economic ?

Draw the bending moment diagram and shear force diagram, Draw the bending m...

Draw the bending moment diagram and shear force diagram: A cantilever beam of 8 m length is subjected to point loads of 15 kN, 10 kN, 25 kN and 20 kN at distances of 4 m, 2 m,

Essence of second law - thermodynamics, Essence of Second Law: Sol: ...

Essence of Second Law: Sol: First law deals with conservation and conversion of energy. But it fails to state the conditions under which the energy conversion are possible.

Elasticity, define prandtl''s stress function

define prandtl''s stress function

What are the objectives of bearing capacity, What are the objectives of bea...

What are the objectives of bearing capacity? The objectives of bearing capacity: a. identify the possible modes of failure that a shallow foundation can undergo, b. under

Develop-implement method to identify numerically equivalent, For example, i...

For example, if one were provided with the set [3 1 3 -4 -6], the resulting answers would be [3 1 -4], [3 1 -4], an [3 3 -6], as these are the three sets of three values which sum

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