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hwk31

# hwk31 - The couple required to turn the wheel of the...

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Unformatted text preview: The couple required to turn the wheel of the exercise bicy- cle is adjusted by changing the weight W. The coefﬁcient of kinetic friction between the wheel and the belt is ,uk. Assume the wheel turns clockwise. (a) Show that the couple M required to turn the wheel is M = WR(1 — (3'4“). (’b) If W = 40 lb and M = 0.2, what force will the scale S indicate when the bicycle is in use? ’ 061450 >" zcs twﬂﬁww WWW ‘ 9. (at i V i I J 1| v The 20kg box A is held in equilibrium on the inclined sur- face by the force T acting on the rope wrapped over the ﬁxed cylin- der. The coefﬁcient of static friction between the box and the inclined surface is 0.1. The coefﬁcient of static friction between the rope and the cylinder is 0.05. Determine the largest value of T that will not cause the box to slip up the inclined surface. . V ——l ‘l, ﬁmléélltlgl EL“ 2’7"}; 0 Twig-Wm élAlr: o 0. wé”: " (0'1 l iﬂ'm bl"? T M428"— IQWMM 20 =7— 0 Al:- 04226:? M44 W M— 0.421497: "I844 ébi‘l- o, 9062]" é7.1»ro,n<o«ézze’f +1844 =0 , 6&5’4 5 ...
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hwk31 - The couple required to turn the wheel of the...

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