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Computer Science,Engineering,Environmental science,Essay writing,Information Systems,Programming Hide all
Teaching Since: Apr 2017
Last Sign in: 453 Weeks Ago, 3 Days Ago
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Education

  • MSC,MBA(IT)
    Standford
    Jun-1997 - Sep-2000

Experience

  • IT Manager
    Honeywell
    Aug-2001 - Present

Category > Applied Sciences Posted 05 May 2017 My Price 8.00

The contractor’s ladder

4/113 The contractor’s ladder jack has welded hooks A and which fit over the rungs of a vertical ladder and support one end of a scaffold plank. The ho- mogeneous crate and portion of a plank supported by the jack have a combined mass of 84 kg. All of the vertical force is supported by the hook at A, and the three bolts support force but not torque.

 

 

 

40°

 40°         C

A                                                                      

F

Calculate the total force supported by the bolt   at

D.  Compare the vertical component of the force at

E  with the vertical component of force   supported

 

            O          E

  75°     D

by the hook at A.

 

       150                     300                100      

 

mm                      mm                   mm

 

 

                                                                    

 

AO = 4²

 

 

BC CD = 9²

DE = 3²

 

 

 

Problem 4/111

 

 

40

     A     mm

E

 

375

mm

 

4/112 The carpenter builds the square frame ABCD and then braces it with member EF as shown in order to prevent racking (distortion into a rhombic shape) under the applied force P. Determine the tension in the brace as a function of x. Take all connections to be pin joints. Member DC is firmly fastened to the floor.

D

 

300

mm

 

C

B

 

 

Problem 4/113

 

 

Answers

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Status NEW Posted 05 May 2017 12:05 PM My Price 8.00

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