2D Rigid Body Example-Crane Part 1

Static equilibrium analysis of the boom of a crane. Parts 1, 2, and 3 use geometry and trig to find force components and moment arms from which the unknowns are computed.
This video was created to support courses in the Engineering Department on the Polytechnic campus of Arizona State University. Links to other videos can be found at www.engineering...
This video is made available under the Creative Commons BY-SA license.

[@jilanigujrat5210]

can someone tell me what is the 2000 and how is the force 2000...

[@Kurdishking55]

Jilani Gujrat it is just a given force...

[@nikaman9539]

He said its the "force applied by gravity" which means weight

[@fspfathersonpaintball6177]

I would like to know how he derived the CofG at this location on the boom. Can this be calculated from the supplied information and how?

[@parkerflop]

the sin cos thing seems switched but I think that it is fine as sin45=cos45

[@shylildude]

i may be wrong but i think you got the cos and sin reversed

[@faroukmabsout508]

yes he took reversed projection for the force at X & Y axis, but in this case we have 45 degrees angle so in trigenometric ruls sin 45=cos 45 then that didn't affect calcul