# 1_2 - A A man welghmg160 lb hoists himself and the 200 lb...

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Unformatted text preview: . A A man welghmg160 lb. hoists himself and the 200 lb. platform by pull- A mg up on the lever shown. Determine the reaction R between his feet and the platform. Find the minimum angle 0 so that the pile of three identical smooth rollers will not collapse. ' N73” M " {5‘ c + {ow/w f” N; @ gshgga M @“-‘W EFXz~NJMM ‘1" N‘ é. .. 1.02,. @+/\/Z,m9«0 :Fj :— + N2. L959 W “ 2, 3m 9 :- N,Wb“09‘ : —-——Wo ‘ ‘ ’ # 5N3 N1®j9 7' W + W 1 Iii/L! Z L .' The 40 lb. electric motor with center of gravity at G’ is pivoted freely , at 0 and drives the pulley A with a V—belt in a counterclockwise direction , and at a. constant speed. If a constant torque of 120 lb. in. is required to drive the pulley about its axis, determine the tensions T1 and T2 in the V—belt and ﬁnd the total force on the supporting pin at 0. ...
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