Marking Scheme

SRE-111
2068 (2012)
clgjfo{ lj1fg
pQ/s'l~hsf
;do M @ 306f !% ldg]6 k"0ff{ª\s M &%, pQL0ff{ª\s M @$
k/LIfs / ;Dk/LIfsx¿nfO{ lgb]{zg M
pQ/k'l:tsf k/LIf0f s'l~hsf pQ/k'l:tsf k/LIf0fsf] lglDt k/LIfsnfO{ ;fdfGo dfu{bz{g xf] . k/LIfsn] pQ/sf]
z'4tf, :t/Lotf, df}lnstf cflb x]/L cfjZostf cg';f/ ljj]s k|of]u u/L :t/ cg';f/ ;xL, :ki6, pko'Qm, dfkgLo /
:t/Lo d"Nofª\sg ug{'kg]{ 5 . ;Dej eP;Dd s'l~hsfn] lgb]{z u/]sf] kl/lw / ;Ldfleq} /xL d"Nofª\sg ug{'kg]{5 .
pQ/k'l:tsf k/LIf0f Pjd\ ;Dk/LIf0f ubf{ o;df lbOPsf cfwf/sf ;fy} lgDg s'/fx¿ clgjfo{ ?kdf kfngf ug'{kg]{5 M
o; s'l~hsfdf lbOPsf afx]s cGo ;xL j}slNks pQ/nfO{ klg tf]lsPsf] cª\s k|bfg ug]{,
k|To]s k|Zgsf] nflu k|bfg ul/Psf] cª\s pQ/k'l:tsfsf] aflx/L kfgfsf] tflnsfdf clgjfo{ ¿kdf r9fpg] .
s'nof]u cª\s / cIf/ b'j}df n]vL x:tfIf/ ug]{,
pQL0ff{ª\ssf] glhs cª\s k|fKt ug]{ pQ/k'l:tsfx¿ k'gM k/LIf0f ug]{ .
;Dk/LIfsn] k|To]s pQ/k'l:tsfsf] k|fKtfª\ssf] of]u clgjfo{ ¿kdf hfFRg] / s'nof]u cª\s / cIf/ b'j}df n]vL
tf]lsPsf] 7fpFdf x:tfIf/ ug]{ .
;Dk/LIfsn] s'g} k|Zgsf] cª\s yk36 ug'{kg]{ ePdf sfl6Psf] 7fpFdf clgjfo{ ¿kdf x:tfIf/ ug]{ / s'nof]u
cª\s / cIf/ b'j}df clgjfo{ ¿kdf n]Vg] .
l6k]S;sf] k|of]u s'g} klg xfntdf gug]{ .
k|Zg
g+
!=s
pQ/x?
‣ j:t'x¿sf] lk08x¿sf] u'0fgkmn jf lk08x¿
‣ j:t'x¿sf] aLrsf] b"/Lsf] ju{df jf (radius)
u'?Tj an cw{Jof;sf] ju{;Fu Jo'tqmdfg'kflts x'g] ePsf]n],
cª\sef/
!
!=%
g sf] dfg e'dWo/]vLo If]qdf = 9.78m/s 2
g sf] dfg w|'jLo If]qdf = 9.83m/s 2
w = mg
lk08 (M) k[YjL = 50kg
1kg = 9.8N
W = mg
= 50×9.8 = 490N
k[YjLdf 490N tf}n pRrfNg ;S5 .
km]/L,
rGb|ddf,
m = ?
w = 490N
g = 1.67 m/s 2
W = mg
= 293.4kg
!
!
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