Force on string - mechanics, Mechanical Engineering

Force on String:

A string ABCD, attached to the two fixed points A and D has two weight of 1000N each attached to it at points B and C. The weights rest with portions AB and CD inclined at an angle of 30° and 60° respectively, to the vertical as shown in the figure given below. Find out the tension in portion AB, BC, CD

484_Force on String.png

Sol.: First the strings ABCD is split in to two parts, and take the joints B and C separately

Let,

T1  = Tension in the String AB

T2  = Tension in the String BC 

T3 = Tension in the String CD

As at joint B three forces are acting. Therefore apply lamis theorem at joint B,

T1/sin60° = T2/sin150° = 1000/sin150°

T1 = {sin60° × 1000}/sin150°

= 1732N                                                   .......ANS

T2 = {sin150° × 1000}/sin150°

= 1000N                                                   .......ANS

Apply lamis theorem at joint C,

T2/sin120° = T3/sin120° = 1000/sin120°

T3 = {sin120° × 1000}/sin120°

= 1000N                                                   .......ANS

 

Posted Date: 10/16/2012 2:38:43 AM | Location : United States







Related Discussions:- Force on string - mechanics, Assignment Help, Ask Question on Force on string - mechanics, Get Answer, Expert's Help, Force on string - mechanics Discussions

Write discussion on Force on string - mechanics
Your posts are moderated
Related Questions
(a) What are the types of material used for making spanners? What are the uses of spanners? (b) Write down the uses of following tools and make neat sketches of the same : (i

Q. Can you explain Investment casting? -Investment casting produces very high surface quality and dimensional accuracy. -Investment casting is commonly used for precision eq

application of optiz

Explain the Base of radial drilling machine The base of the drilling machine handles the entire machine and when bolted to the floor, gives for vibration-free operation and bes

Mash stitch welding An overlap of about 1.15 mm is kept and then the plates are squeezed flash by application of pressure at hot condition.  Mash stitch welding is used in the

Evaluate the normal and tangential stresses: Q. 20: At the point in stressed body, the principal stresses are σ x = 80 kN/m 2 and σ y = 40  kN/m 2 . Determine the norma

Prlblems 1 & 3 can you provide accurate and clear solved out solutions not done by computer either.

Backup Purge Backup purge gas can also be used to protect the under side of the weld and its adjacent base metal surfaces from oxidation on the time of welding . Uniformity

Q. Show the Limitations of Rigid bed models? Due to vertical exaggeration, model slope automatically becomes steeper than in the prototype, this slope exaggeration being the sa

Explain the several types of pattern allowances with neat sketch. Show the six important - aspects of gating system design. Illustrate briefly their functions.