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Physics

Mechanics

Easy

Question

$A space g r a p h space b e t w e e n space k i n e t i c space e n e r g y space a n d space m o m e n t u m space o f space a space p a r t i c l e space i s space p l o t t e d space a s space s h o w n space i n space t h e space f i g u r e. space T h e space m a s s space o f space t h e space m o v i n g space p a r t i c l e space i s space$

$1 k g$
$2 k g$
$3 k g$
$4 k g$

The correct answer is: $2 k g$

$K equals fraction numerator P squared over denominator 2 m end fraction. text From graph; end text space of 1em 4 equals fraction numerator 4 squared over denominator 2 m end fraction comma space of 1em m equals 2 kg$

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Three identical balls each of mass m = 0.5 kg are connected with ideal string as shown in figure and this system rests on a smooth horizontal table. At moment t = 0 ball B is imparted a velocity v₀ = 9 m/s as shown. Then the velocity of A in m/s when it collides with ball C.

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