Engineering Statics Video 02-20c

Step-by-step video analysis of a particle in 2D using engineering statics. Particle analysis is typically the first type of analysis that an engineering student will encounter in engineering statics. In particle analysis you only have two equations of static equilibrium, sum of the forces in the x and y. You can't use sum of the moments on a particle since all of the forces go through a point, therefore no perpendicular distances. You can view more engineering statics problems videos on www.YourOtherTeacher.com.

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[drzakk]

how do i know where to cut the the elements if i have two different junctions?

[MrStatics]

@drzakk

In general you cut through whatever you are trying to find. So in this case the problem asked for the force in AB and BC. Then try to complete the bubble( cut) by not cutting through anything else because the more things you cut through the more unknowns you will have.

[MrStatics]

Since we are dealing with wires the resultant force in them must be directed along the wire, so now you know the directions of AB and BC. Of course the weight must be down.

[MrJamesessary]

The question asks you to determine the largest dimension of d. How do you know that what you have calculated is the min or the max?

[MrStatics]

@MrJamesessary

Good question. Well you just go ahead and solve it with what you know then look at the answer. If the answer is just a single value then there is no max/min, just that is the answer. But let's say you had to use the quadradic formula to solve then there would be two answers because of the +- in the formula. I hope that helps!

[agnazareth02]

hi, i want to know how do u get that d=2.43 m..bcoz i always get 124.5m, tanx

[MrStatics]

@agnazareth02

Please check to make sure are in degrees and not radians. Let me know if that doesn't take care of the problem.

[rokrfog]

Your videos are awesome. THANK YOU VERY MUCH!!!

[palowmeetoo]

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[MrJongjongz]

can i download your videos? i am an engineering student and i do not have an internet connection?

[frenchfryz89]

hi., can you upload some videos about vector(3D) problems..? tnx a lot. I really like your solution and the way you discuss analyze the problem.



[teaktrub]

hi.. do you have a discussion video about three equilibrium forces? it will be very much appreciated.. thanks a lot..:)

[Triumph808]

How do you know that the triangle that you started off drawing using the forces (polygon/triangle method, your first method) is the same triangle on the given picture?