Question

G ONOG O D Week 10 W 12 INGG100 ENGEX NOG INGGO 2 Werkt O determin + C U/Sampata Local Packages Microsoft Microsoft Edge Boybabwe/Temptate/Download ENGG 102.20W207%20Lectu # O 21 037 | Contents - e + Entowid L Add notes Page View A Read aloud 2 Problems involving Dry Friction Example 1 The uniform crate has a mass of 20kg. If a force P = 80N is applied on to the crate, determine if it remains in equilibrium. The coefficient of static friction is u = 0.3. P.IN (C) LOW 2016 McCarthy C PALL A d ENG ook AS DEF! Gy HJ K L z to CI V BIN M

Answer 1

fconce 0.8m P=2014 K m-20 kg F=80N 0-30 ls=0.3 fsino 30 D- 0.2m. I wang N = mg + Fsino Horizontal vertical fH = fcopo = 80 cop 30º = 4013 M = 69.28N fy ef sme = 80 Sin 30 = 40 M farce aching upwarda derecht ans : M= Rsino mg Static frictional farie (ty man) (fr max) = MM = m (fisino+mg) (frmax) = 0.3 ( 40 + 20X4-8) = 70.89 since ff max (=70.80) > fH (= 69.28N) So Block will not move
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