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Displacement of COM:Application

a bomb of mas...

Question

a bomb of mass 3 kg at rest explodes into two parts one part of mass 2 kg is found at a speed of 12 metre per second towards the east what is the velocity of the other part

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Solution

Dear Student,
$U \sin g c o n s e r v a t i o n o f m o m e n t u m . M V = m_{1} v_{1} + m_{2} v_{2} H e r e M = 3 k g, V = 0, m_{1} = 2 k g, v_{1} = 12 m / s, m_{2} = 3 - 2 = 1 k g, v_{2} = ? S o, 3 (0) = 2 (12) + 1 (v_{2}) 0 - 24 m / s = v_{2} v_{2} = - 24 m / s (-) s i g n i n d i c a t e s t h a t t h e d i r e c t i o n o f s e c o n d p a r t i c l e i s o p p o s i t e t o t h e f i r s t p a r t i c l e t h a t i s s e c o n d p a r t i c l e m o v e d d u e w e s t .$
Regards.

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