R. C. Hibbeler 14th edition

"Dynamics"

Power and Efficiency Chapter

(14)

By

eng.Ahmed Elsamman

Eng.ahmedelsamman@live.com

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