Calculate force transmitted by the man on the floor of lift, Mechanical Engineering

Calculate force transmitted by the man on the floor of lift:

A vertical lift having total mass 500Kg acquires an upward velocity of 2m/sec over a distance of 3m of motion with the constant acceleration, starting from rest. Determine the tension in the cable supporting lift. If lift while stopping moves with the constant deceleration and comes to rest in 2sec, calculate force transmitted by the man having mass 75kg on the floor of lift during the interval.

Sol: Given,

Mass of lift ML  = 500Kg

Final Velocity v = 2m/sec

Distance covered s = 3m

Initial velocity u = 0

Cable tension T = ?

Apply relation v2  = u2  + 2as

22=0+ 2a X 3a = 2/3 m/sec2                                                      ...(i)

As lift moves up, T > ML X g Net accelerating force = T - MLg, and is equal to,T - MLg = maT- 500 X 9.81 = 500 X 2/3

T = 5238.5N                                                                     .......ANS

Let force transmitted by the man having mass of 75Kg, is FF - mg = ma

For finding acceleration, by sing relation v = u + at0 = 2 + a X 2

219_Calculate force transmitted by the man on the floor of lift.png

 a = -1 m/sec2                                                                                                               ..(ii)

By putting value in equation, F - mg = ma

F - 75 X 9.81 = 75(-1)

F = 660.75N                                                             .......ANS

 

Posted Date: 10/19/2012 9:13:36 AM | Location : United States







Related Discussions:- Calculate force transmitted by the man on the floor of lift, Assignment Help, Ask Question on Calculate force transmitted by the man on the floor of lift, Get Answer, Expert's Help, Calculate force transmitted by the man on the floor of lift Discussions

Write discussion on Calculate force transmitted by the man on the floor of lift
Your posts are moderated
Related Questions
Derive the mathematical expression for heat transfer and temperature distribution through infinite long fin?

Explain Internal Broaching - Types of Broaching Internal broaching operation is adopted for producing internal surface such as holes, keyways and teeth of an internal gear for

Calculate the value of force - frictionless  A block weighing 5KN is attached to the chord that passes over the frictionless pulley, and supports weight of 2KN. The coeffic

Illustrates the concept of bearing capacity of soil? The concept of bearing capacity of soil is the very essence of design and analysis of shallow foundations. In order to inve

Determine the moment of resistance of the flitched beam: A flitched beam consists of a wooden beam of width 120 mm & depth 250 mm & mild steel plates of thickness 10 mm & widt

Di fferentiate between strength of material and engineering mechanics Sol.: Three primary areas of mechanics of solids are statics, dynamics and the strength of materials.

CAUSES AND REMEDIES OF MOTORCYCLE PROBLEMS  If Engine Overheats Causes of Problem Remedy   Incorrect spark plug make/model


Homogeneous and isotropic material: A homogeneous material implies that elastic properties like modulus of elasticity and Poisson's ratio of material are same everywhere in

Components of power plant &it''s functions