W В 270 mm A 180 mm

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If the static friction coefficient assume 0.4, calculate the smallest (theta) angel that keep the plate with weight W at its rest. 

W
B
to 270 mm
A
180 mm
Transcribed Image Text:W B to 270 mm A 180 mm
Expert Solution
Step 1

Advanced Physics homework question answer, step 1, image 1

to keep the weight W balanced we should make sure that the forces from all directions must be balanced,

the net forces along the x -axis must be 0

Fx = 0μNA - NB = 00.4NA  = NB

similarly forces along y axis also balance,

Fy = 0NA +μNB - W = 0NA +0.4NB -W = 0NA + 0.4(0.4NA)  =WNA = 0.86W

as we know 0.4NA  = NB

NB = 0.4(0.86W)NB =0.34W

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