Question

(12 points) Difficulty (4/5)

F 2013 Michael Swanbom BY NC SA A B C h2 E b k C A

a	b	c	h1h1	h2h2
20 cm	30 cm	36 cm	27 cm	21 cm

A folding tray mechanism is attached to a wall as shown. The assembly has the dimensions given above. When a force of F = 175 N is applied at an angle of θθ = 31 degrees, find the internal forces indicated in the table below.

Forces: (Denote rightward or upward forces with positive values; leftward or downward forces with negative values.)

At this point,	this body	exerts a horizontal force of:	and a vertical force of:	on this body.		The magnitude of the resultant force is:
A	support A			ABC
B	ABC			BED
D	support D			BED
E	EG			BED

be sure to include units with your answers

Answer 1

Let us assuwe the an gleg , R ag. Show i fg ure atb Tana A 20 t30 TaM 21 t 2) 2S 46.16 Similasly BTav h-HD = Tam Co S 42.0 Ta SOつ4616 20 - して CoSublb 72.84 A Consodeso em b esu apply ABC NoLo By (atb)FCose latb+)= c l5Cos 31( 20 t30 + 3 6) 2y (20 t30) 2S 8 N F CoS D Fy っ Ay NoLo tak Ay t 258-1S CoS 31 Nou A tFSJn -A 5sinz1° A D 13

Now dsauo tb FeD apply of BED lee + Fena)-By (tb)o Fer Cos p Ca) GE ゥ FacCos72.84 (20) + FacSin 72.8y (20) 258 20.t 30 29o0 e FGE take NOW t SIG CoS 72.SY Dy Py N St So EFx Now aPply foo the =D GF SMB SI6 Si 72:8y 4 43 N