Calculate the force - pulley, Mechanical Engineering

Assignment Help:

Calculate the force - pulley:

A string is passing over a smooth pulley. The string supports the mass m on one side which is to be pulled up with acceleration a. calculate the force T which must be applied at the end B of the string AB. Treat the block as a particle.

Solution

Figure (b) shows the free body diagram of the mass. The forces acting on it shall be the tension T in the string and the weight mg of the block. Since the block moves upwards, the inertia force Fi = - ma will be directed downwards. The block may be considered in equilibrium under the action of forces T, mg and ma.

          ∴ T - m g - m a = 0

or         T = m a + m g

                = m (a + g )

Therefore, the tension T to be applied to the end B shall equal to T = m (a + g ).


Related Discussions:- Calculate the force - pulley

Thermodynamics, determine the relationships between system constants for an...

determine the relationships between system constants for an ideal gas

Supports for rigid bodies - space structures, Supports for Rigid Bodies (Sp...

Supports for Rigid Bodies (Space Structures): The primary step in solving equilibrium problems is to draw free-body diagram. Isolate the body through its surrounding. Replace

Application of hot service insulation, Q. Application of hot service insula...

Q. Application of hot service insulation? Provision for the expansion of hot equipment shall include the installation of expansion springs in circumferential banding securing i

Excessive pedal pressure required motorcycle problem, If Excessive Pedal Pr...

If Excessive Pedal Pressure Required Causes of Problem Remedy Incorrect shoe placement Improper anchor pin position l

Stress strain, 1. Determine young''s modulus using first 20 data points 2....

1. Determine young''s modulus using first 20 data points 2. Determine yield strain and yield stress based on -0.1 offset 3. Determine max(or min) stress. 4. Determine toughness

Illustrate thermal and hydrodynamic boundary layer, Define different regime...

Define different regimes of boiling and depict their ranges on a excess temperature curve us heat flux. Also distinguish between laminar film condensation and dropwise condensation

Theory of mechanics , analyze a six bar linkage to get the position, veloci...

analyze a six bar linkage to get the position, velocity and acceleration

Components of steam power plant, Component s of Steam Power Plant: Th...

Component s of Steam Power Plant: There are four components of steam power plant: 1. The boiler: Hot-source reservoir in which the combustion gases raise steam. 2. Engi

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