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Question Number 39750 by rahul 19 last updated on 10/Jul/18

Commented by rahul 19 last updated on 10/Jul/18

Commented by rahul 19 last updated on 10/Jul/18

$Also find {Acc}^{n} of block A & D just after the$ $spring 1 is cut .$
Commented by rahul 19 last updated on 10/Jul/18

$Mrw Sir, this Q . is waiting for u .$
	Answered by MrW3 last updated on 11/Jul/18

	$W i t h ‘ ‘ a f t e r t h e c u t o f a {s t r i n g}^{″} I {d o n}^{'} t m e a n$ $t h e i n s t a n t w h e n t h e s t r i n g i s c u t .$ $B e f o r e a s t r i n g i s c u t :$ $T_{A B} = 30 N$ $T_{S 1} = 60 N$ $T_{S 2} = 20 N$ $T_{C D} = 40 N$ $T_{C P} = 60 N$ $A f t e r c u t a t s p r i n g 2 :$ $a = \frac{(6 - 4) g}{6 + 4} = \frac{g}{5} = 2 m / s^{2}$ $30 - T_{A B} = 3 \times 2$ $\Rightarrow T_{A B} = 24 N < 30 N$ $\Rightarrow Q (i) \Rightarrow A (b)$ $T_{C D} - 20 = 2 \times 2$ $\Rightarrow T_{C D} = 24 N < 40 N$ $\Rightarrow Q (i i) \Rightarrow A (b)$ $A f t e r c u t a t s t r i n g b t w . C a n d p u l l e y :$ $A a n d B h a v e f r e i f a l l .$ $C, D a n d E h a v e f r e i f a l l .$ $T_{A B} = 0$ $T_{C D} = 0$ $\Rightarrow Q (i i i) \Rightarrow A (d)$ $\Rightarrow Q (i v) \Rightarrow A (d)$
	Commented by rahul 19 last updated on 13/Jul/18
	Sorry sir , your ans. didn't match with book ans. Kindly check !
	Commented by rahul 19 last updated on 13/Jul/18

	$Ans .$ $(i) \to c$ $(ii) \to b$ $(iii) \to b, d$ $(iv) \to b .$
	Commented by MrW3 last updated on 13/Jul/18

	$I k n o w . T h e a n s w e r d e p e n t s v e r y m u c h$ $w h a t i s m e a n t w i t h ‘ ‘ a f t e r . . .^{″} . F o r$ $m y a n s w e r s I {d i d n}^{'} t m e a n t h e i n s t a n t$ $i m m e d i a t e l y a f t e r a s t r i n g i s c u t, b u t$ $I m e a n t t h e s t a b l e s t a t e a f t e r a s t r i n g$ $i s c u t . I n t h i s s t a t e a l l o b j e c t s h a v e a$ $d e f i n e d m o t i o n .$ $P l e a s e {d o n}^{'} t t a k e t h i s k i n d o f s o l u t i o n$ $f r o m m e a s ‘ ‘ {c o r r e c t}^{″} s o l u t i o n .$
	Commented by rahul 19 last updated on 13/Jul/18

	$Ok, Thank You Sir : -)$
	Answered by MrW3 last updated on 11/Jul/18

	$A t t h e m o m e n t j u s t a f t e r t h e s p r i n g 1$ $i s c u t :$ $3 \times 10 - 30 = 3 a_{A}$ $\Rightarrow a_{A} = 0$ $s i m i l a r l y$ $\Rightarrow a_{D} = 0$
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