Question

PHYS 202 Assignment #2 To be handed by Fri Jan 31, 2020 Show all of your work to get full marks. Note that numbers and figures may be different from those in the textbook Textbook Chapter Problem numbers 2-131+2-133 3-28, 3-54,3-50 2-131+2-133: (a) Determine the angle between the pipe segments BA and BC. (b) Determine the magnitudes of the components of F acting along and perpendicular to segment BA of the pipe assembly. 3 ft 4 ft .4 ft F = {401 - 55j + 65k) N

Answer 1

Co-ordinntes ob the pnnts A, B mel c → (o,0,0) B > (3,4,0) c → (7,6,-4) [3? +45] - 4 &]+ (7? + 65-4R)-(3^+49) 3i¢4ĵ+ Ok 7 + 6 5 - 4 AC [4î + 23 - 4 ]+ [2*+4*a0]% TABI = + 2+ (-4)^]"z [a"

O Angle between 2 reetors But we need the other side amgle O om रु् Like = 180 180 - 0 We know by reetor rule cos Ф

3î +4ŷ ).(4^+ 29 -4k) 3x4) + (4x2) + cox-4) cus- 2% = 48.2 180 -A 180- 48.2 131.8° [40^ - 553+65%] N [3? +aŷ ] H The component of along F] . - AB (3 f+49] · [40 ↑- 553 +65 k] [21+45] AB (3 x40) + (4x-55) + (ox65) Bi +43] 25 -100 %3D [3î +43] -4 xI 8^ + 49] F1 - 12 ↑ - 163 This is along FB 16 ŷ The compment per pendi culev to ÃB 7 - F1- [40 •- 553 + 15 ] [40 î + - 55 + 65 k [-12^-169] 52 ↑ - 30 î +65 [ [This is parpendiculow to A@I ABI N/3