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

Agitation and aeration systems, Careful consideration of the bioreactor agi...

Careful consideration of the bioreactor agitation and aeration system is required in order to maintain a homogeneous environment and provide sufficient oxygen transfer rates to mee

Compute efficiency of dual cycle, (a) Compare 2 two-stroke cycle engines wi...

(a) Compare 2 two-stroke cycle engines with 4 stroke cycle engines. What are the function of flywheel and Cam Shaft? (b) Derive a mathematical expression for efficiency of dual

Determine number of coils and length of the spring, Determine number of coi...

Determine number of coils and length of the spring: A close coiled helical spring ought to extend by 120 mm under an axial force of 1200 N. If mean coil radius is equal to 40

Welding, difference between pinhole and porosity

difference between pinhole and porosity

Functions of flux coating, FUNCTIONS OF FLUX COATING The coating of the e...

FUNCTIONS OF FLUX COATING The coating of the electrode performs very important functions which are essential for obtaining a weld of required quality; in terms of chemical compos

Stitch welding, Stitch Welding This is a variation of spot welding, in ...

Stitch Welding This is a variation of spot welding, in which a series of overlapping spot welds are made in the same manner as stitching cloth. Stitch welding may be performed

Electron beam welding-nuclear applications, NUCLEAR APPLICATIONS OF ELECTRO...

NUCLEAR APPLICATIONS OF ELECTRON BEAM WELDING   Electron beam has been applied to the fabrication of fuel elements for pressurised water reactors and the distinct advantages

Methods of analysis of trusses, Methods of analysis of trusses: What ...

Methods of analysis of trusses: What are the methods of analysis of trusses? What is found when the analysis of a system is done? Sol.:  The forces in the members of

Mechanicalthermodynamics, Does this college offer courses in the field of m...

Does this college offer courses in the field of mechanicalthermodynamics?

Quality of welds produced by submerged arc welding, a) You have been assign...

a) You have been assigned to design a robotics spot welding experiment for low carbon steel sheets. You found an experimental power source for spot welding process which is designe

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