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Unformatted text preview: H4 3f28iﬂ8 HW #424 Key TableGroup 18.42 The lﬂUkg cylindrical disk is at rest when the force F is applied to a cord wrapped around it. The static
and kinetic coeﬂieients of friclion between the disk and the surface are ()2. Determine the angular acceleration ofthe disk if{a} F= 500 N and (b) F = moo N.
Strategy: First solve the problem by assuming that the disk does not slip, hut rolls on the surface. Determine the
frictional force, and find out whether it exceeds the product of the coefﬁcient of friction and the normal force. if it does. you must rework the problem assuming that the disk slips. _rs‘ Agni...” N0 Eat—119 : a
if
.: 05:9; M ‘7' AfﬁneHF: “a”; 17W} "‘" lMPossrﬁeE h, {ZN 5M 5’6 miss out? ﬁgumftmg 18.55 As a result nfthe constant couple M applied to the lkg disk, the angular acceleration oFthe CIAkg
slender bar is LC“). Detenninc M and the counlcrclockwise angular acceleration of the telling disk. afarUﬁb. Z Scefoart,
AﬁﬁHM—E SLlP ’3’ d: aqua
A ___i ,2:— AS’5“W F4; ﬁ—ﬂ '—___———=I l'n. aim—u. I'M Ladiest waiter“ 54:0 1 foﬁae’XTZO
615's d—EF2AA2'4QQB
A} HA/ :_.c:}
we? PEMqﬁi ‘Ax (.S'm‘Fﬂ)
/= 3314'” " ArCimseﬂ =0
y. A, = ﬁes3m 4» an.
ﬁn" 13111 The combined mass ofthe motor: cle and rider is tee k I. Each 9hg wheel has at SSHmm radius and e
..,_'—"“‘ moment ol‘ lnertio I = 0.3 legmi The engine drives the rear wheel by exerting a couple on it. lftlre rear wheel
exerts a MillN horizontal force on the road and you do not neglect the horizontal force exerted on the road by
the front wheel, determine {a} the motorcycle’s acceleration and (b) the normal Forces exerted on the road by the
rear and front wheels. {The location of the center ol'maso of the motorcycle. not inclml‘lng its wheels, is shown} Mei} (ﬁ HM c Fro1w :1:th kj
gefnruiﬂ 3: Elem:1. Agar/re No SLIP ;
6/ a = 32
L""{"€El: .’:r.3r PtSﬁdME on LIFT oFF:
#f—i .. [5 I It‘u'll em WHEEL . H ...
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This homework help was uploaded on 04/07/2008 for the course ME 201 taught by Professor Biggers during the Spring '08 term at Clemson.
 Spring '08
 Biggers
 Statics

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