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

Thormodynamics, define thormodynamics and its laws

define thormodynamics and its laws

Corrctoin couple, when correction couple should be applied?

when correction couple should be applied?

Environmental factors for high temperature service materials, Q. Environmen...

Q. Environmental factors for high temperature service materials? Many environmental factors must also be considered when choosing a material for high temperature service. High

Rotational-mechanics, A straight rod of length L is released on a friction ...

A straight rod of length L is released on a friction less horizontal floor in a vertical position . As it falls( also slips) , the distance of a point on the rod from the lower end

Calculate the support reaction, Calculate the support reaction: Q: A ...

Calculate the support reaction: Q: A beam 8m long is hinged at point A and supported on rollers over smooth surface inclined at 300 to horizontal at point B . The beam

What is the role of mis in decision making, Can you explain about MIS ? Wha...

Can you explain about MIS ? What is the role of MIS in decision making ? Illustrate standardization, specialization and simplification in product design and development.

Method of joint, Method of joint: How you can find out force in the m...

Method of joint: How you can find out force in the member of truss by using method of joint? Sol.: In this, after determining the reactions at supports, the equilibrium

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