Homework #24A

Homework #24A - H4 3f28ifl8 HW #424 Key Table-Group 18.42...

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Unformatted text preview: H4 3f28ifl8 HW #424 Key Table-Group 18.42 The lflU-kg 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' Affine-HF: “a”; 17W} "‘" lMPossrfieE h, {ZN 5M 5’6 miss out? figumftmg 18.55 As a result nfthe constant couple M applied to the l-kg disk, the angular acceleration oFthe CIA-kg slender bar is LC“). Detenninc M and the counlcrclockwise angular acceleration of the telling disk. afarU-fib. Z Scefoart, Afifi-HM—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’XT-ZO 615's d—EF2AA2'4QQB A} HA/ -:_.c:} we? PEMqfii ‘Ax (.S'm‘F-fl) /= 3314'” " ArCimsefl =0 y. A, = fies-3m 4» an. fin" 13111 The combined mass ofthe motor: cle and rider is tee k I. Each 9-hg wheel has at SSH-mm radius and e ..--,_--'|—-"“‘ moment ol‘ lnertio I = 0.3 leg-mi The engine drives the rear wheel by exerting a couple on it. lftlre rear wheel exerts a Mill-N 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 Fro-1w :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.

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Homework #24A - H4 3f28ifl8 HW #424 Key Table-Group 18.42...

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