dynamics - eng-hs.neteng-hs.net/files/ch14-2.pdf · r. c. hibbeler 14th edition...
TRANSCRIPT
R. C. Hibbeler 14th edition
"Dynamics"
Power and Efficiency Chapter
(14)
By
eng.Ahmed Elsamman
0020: 0111 011 93 97
?" *)u( 2 #p t- g = y = F,v s^l'^(
Jt Jt(w) t1/,) ( Ft toA) 1t"r)
I hr a 55 o $t'xu7,
LhP? ++6 .^l
Pow u( ord P"fr
e,8 [ t c'*^b €): P" *kr( fn|ud
rN ,N:i :i1.
W h"h.n '
ffi $ ^\{t{S f:l+$S&SS:${:}|!l
({;) The 100(}:lb *levat*r is ]"rnistuil [r1' th* pul[trv 5ystnnrl
and meitclr M" If [lre m*tnr *xcr{"s n c*nstant f *r*e t-lf 5il{} trl:
un the rn[r]c, clstetn]in* t"hs pr]we.r that n:ust h* suppliee$ tt:th* m*t*r' at the instnllt tlie frlacl has heen huisle d s * l5 f t
stnr{ing.fi-*mrrc:st'".I.ltgm:*[*rhtlsttne.f[ieierrcy*ilu
nNS 2 \sco
€ a.a-65
5'. = g
Vo= Q
L'b '--+' tlA g 9+3Z'z
61 = 15
Z-=Po*kf o*tr'Pdl
!"*n "f i^?*t$.vt,^
?t ivt
t-::+> V - =
.,
V*=
A^+*i €h --
3 (5o") t
F.v
-
=z
v}\ct
looo =
3c50") oo "65
1o ou
3L. r
Vo' + ?-* ($ - t)o +.$Cts- ")
ct
-F:or = l6.t $t/st
-F- v= al.att $tA
t5o.tLx\o'orz.?J hP
F Pt,'. =
3 (5o')
Is.$t
$,."*>=-
(A) A nr*tr:r h*ists rt 60 - kg cr"r{e at r} f$nstirnt velncity t* a heigtrt of ir = 5 ttt
iri 2 s" I{'the inrlicat*r"l n(l\ryer nf thc motCI}- is 3.2 ftH/. d*tennine lhe n"lolnr's
*fficiene v.
F^*l a4\6r lqr t Z, : cl. A{
Enq.Ahroed ElsarnrnanVJ
0111 011 93 97