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Question Number 53330 by Kunal12588 last updated on 20/Jan/19

Commented by Kunal12588 last updated on 20/Jan/19

Commented by tanmay.chaudhury50@gmail.com last updated on 20/Jan/19

$F \times S = \frac{1}{2} (2 m) \times V_{2 m}^{2} + μ (2 m g) s$ $F \times S = \frac{1}{2} (m) \times V_{m}^{2} + μ (m g) s$ $μ = f r i c i o n c o e f f i c i e n t b e t w e e n i c e a n d b o a t$ ${(K . E)}_{2 m} + μ (2 m g) s = {(K . E)}_{m} + μ m g s$ $μ \times 2 m g s - μ m g s = {(K . E)}_{m} - {(K . E)}_{2 m}$ $s o {(K . E)}_{m} > {(K . E)}_{2 m}$ $p l s c h e c k i s i t c o r r e c t . . . i f n o t p l s c o m m e n t w i t h$ $a n s w e r . . .$
Commented by Kunal12588 last updated on 21/Jan/19
I think what you are doing is correct but the question ask something else.(great conceptual question)
Commented by Kunal12588 last updated on 21/Jan/19

Commented by tanmay.chaudhury50@gmail.com last updated on 21/Jan/19

$t h a n k y o u f o r a n s w e r . . . b u t i t h o u g h t t h e f r i c t u o n$ $b e t w e e n i c e a n d b o a t . . w h i c h c a u s e t h e i c e t o m e l t$ $l o c a l i s e d t h u s h e l p t o m o v e f o r w a r d .$ $i f f r i c t i o n i g n o r e d t h e n$ $△ K . E = w o r k d o n e$ $\frac{1}{2} \times 2 m \times v_{2 m}^{2} - 0 = F \times s f o r b o a t 2 m m a s s$ $\frac{1}{2} \times m \times v_{m}^{2} - 0 = F \times S f o r b o a t m m a s s$ $t h u s$ ${(K . E)}_{2 m}^{f i n a l} = {(K . E)}_{m}^{f i n a l}$
Commented by Kunal12588 last updated on 21/Jan/19
yeah I was thinking why are you adding the frictional force
Commented by tanmay.chaudhury50@gmail.com last updated on 21/Jan/19

Commented by tanmay.chaudhury50@gmail.com last updated on 21/Jan/19

Commented by tanmay.chaudhury50@gmail.com last updated on 21/Jan/19

Commented by tanmay.chaudhury50@gmail.com last updated on 21/Jan/19

Commented by Kunal12588 last updated on 21/Jan/19
Thank you very much sir
Commented by tanmay.chaudhury50@gmail.com last updated on 21/Jan/19

$w h i c h b o o k y o u r e a d . . . i t h i n k a t p r e s e n t d a y s$ $p h y s i c s g a l a x y b o o k s b y A s h s i s h A r o r a i s e x c e l l e n t$
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