Determine least value of work, Mechanical Engineering

Assignment Help:

Determine least value of work:

Q. Determine least value of W as shown in the figure given below to keep the system of connected bodies in equilibrium µ for surface of contact between plane AC and block = 0.28 and that between the plane BC and block = 0.02

1161_Determine least value of work.png

Sol.: For least value W, motion of 2000N block must be impending downward.

From the free body diagram of block 2000N as shown in the figure

∑V = 0

R1  - 2000cos30° = 0

R1 = 1732.06N                                                                                                           ...(i)

∑H = 0

T + µ1R1 - 2000sin30° = 0

T = 2000sin30° - 0.20 × 1732.06, T = 653.6N                                             ...(ii)

Now Consider the free body diagram of WN block, as shown in the figure

∑V = 0

R2 = Wcos60° = 0

R2 = 0.5W N                                                                                                            ...(iii)

∑H = 0

T - µ2R2 - Wsin60° = 0

653.6 = Wsin60° - 0.28 × 0.5W

WLEAST = 649.7N                                                                        .......ANS


Related Discussions:- Determine least value of work

Help with homework, The crate A of weight W=27lb is being pulled to the rig...

The crate A of weight W=27lb is being pulled to the right by the winch at B. The crate starts at x=0 and is pulled a total distance 15ft over the rough surface for which the coeffi

Matlab question please help me, The salary calculation method for employees...

The salary calculation method for employees of a company is as follows: (1) If the number of working hours exceeds 120 hours, an additional 15% will be issued for the excess part;

Determine the deflection , Obtain the equations of the elastic curve and us...

Obtain the equations of the elastic curve and use them to determine the deflection and rotation at point B in terms of E, I, F and L.

Find velocity and acceleration of the slider , Question: The disk 3 sho...

Question: The disk 3 shown in the figure rotates at a constant angular velocity w 3 = 2.0 rad/s. A slider in a slot in the disk causes rod 2 to rotate.  When the slider

Belts, laws of belts ?

laws of belts ?

Shear force and bending moment diagram, Shear force and bending moment diag...

Shear force and bending moment diagram: How can you draw a shear force and bending moment diagram. Sol.: In these diagrams, the Shear Force or bending moment are repr

Construct the load displacement diagram, A suspended walkway in an undergr...

A suspended walkway in an underground cavern consists of a deck supported by three tie rods placed symmetrically about the centre as shown below: The rods are each of

Find increase in the length of bar, Find increase in the length of bar: ...

Find increase in the length of bar: Q: Find increase in the length of bar of uniform section because of self weight. Sol.: Take a bar of cross sectional area A and leng

Assignment, Which chromium plating is more eco-friendly - trivalent or Hexa...

Which chromium plating is more eco-friendly - trivalent or Hexavalent? Justify your answer in the light of environmental issues caused.

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