Sample problem on hydrostatic pressure on plane surfaces | Fluid Mechanics Lesson 9

[@antonpascua8795]

Thanks! I entered the matrix!

[@leowinparas14]

thank you Tutor Jack

[@TutorJackPh]

You're welcome lods☺️

[@luckyjohnabril4361]

Sir Tutor Jack, sa part C po component po ba hinahanap o yung reaction at B sir? salamat sa pag clarify sir

[@TutorJackPh]

Hello lods, reaction at B kinuha natin lods 😊

[@malugaoaprilrose3946]

Sir sa 10:09 po, paano po naging 4.51 ft yung 6-0.537? Hindi po ba dapat 5.463ft yung moment arm ng F?

[@TutorJackPh]

Sorry lods, mali lng yung nasulat pero sa calcu ay 5.463ft talaga ginamit as moment arm hehe

[@KennethRoyBanares]

Hello Sir, sa part (c) po dba dapat sa summation of horizontal dapat 9.6/12 x 41164.80 lb and for vertical is 7.2/12 x 41164.80 lb ? Am I correct ? salamat and God bless!

[@TutorJackPh]

naiba na yung sine and cosine ng alpha lods, naikot na kasi figure

[@renzjeromemorales5977]

ask lang po sir bakit sa inertia na formula hindi po 1/2 (b)(h)^3 kung triangle naman po sya sir?

[@TutorJackPh]

Rectangular yung gate lods, 4 ft wide. Inertia ng gate icocompute.

[@johnvincentoriana9520]

hello sir, ask ko lang kung kelan ba dapat i-consider yung trapezoidal na figure ng pressure kapag kukunin yung force? kapag sinabi lang po ba sa problem na resultant force?

[@TutorJackPh]

Yes lods pagkukunin yung resultant force. Triangular talaga yung pressure hanggang water surface kasi zero sa surface pero dahil yung gate sa problem ay hindi naman hanggang water surface, macut yung triangular na shape, magiging trapezoid

[@johnvincentoriana9520]

@@TutorJackPh okay sir thank you!

[@luzvimindamonton5565]

Thank u instructor ☺️☺️

[@TutorJackPh]

You're welcome 😊

[@marcfranzpenson9723]

Sa 14:04, bakit po biglang nagpalit ng direction yung Bx? Salamat po

[@TutorJackPh]

Oks lng yan lods kahit ano direction, if positive lalabas sa Bx, meaning tama direction na assumed, kung negative naman, babaliktarin direction ng Bx. Binaliktad ko na in advance yan para ma positive hehe makukuha mo din yan kung ano tamang direction agad, practice lng

[@marsenluv3183]

Paano kinuha yun 12 ft sir?

[@TutorJackPh]

pythagorean theorem lods, na discuss dito 3:20

[@kissyriddles3808]

9:02 bakit divide by .60 po?

[@cliffordcoreal842]

naka simplify lang yung 7.2/12

[@princesalazar8133]

Mali po direction ng Bx. It should be right para maging positive ang result. :)

[@TutorJackPh]

Yes lods 👍

[@thetrailer7626]

Sir kung triangular gate po yan mali po ata pag kuha nyo sa cg

[@TutorJackPh]

Rectangular gate yan lods, 4 ft wide nakalagay sa problem

[@thetrailer7626]

Triangular gate po ba yan sir??

[@TutorJackPh]

Hindi po, rectangular gate yan na 4ft wide, ang pressure distribution ang triangular.

[@TutorJackPh]

I mean magiging triangular yung pressure distrbution pag iextend natin hanggang water surface

[@kennethrevilla639]

San nakuha yung denominator na 0.6?

[@TutorJackPh]

San lods?

[@kennethrevilla639]

@@TutorJackPh 9:00

[@TutorJackPh]

@@kennethrevilla639 7.2/12=0.60 yan lods

[@TutorJackPh]

Bale ycg = (17- (7.2/2))/(7.2/12)