craker rest explodes into two equal parts these parts will move in
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show that these two pieces of cracker flies in opposite direction
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Initial momentum = 0
by conservation of momentum, final momentum = 0
now let the velocity of part 1 = v
and velocity of second part = u
by conservation of momentum ,
(50g)u + (50g)v = 0
taking 50 g common
(50g)(u + v) = 0
so u + v = 0
so v = -u
so now the minus sign here indicates that although the magnitude of velocity of both parts is same but the direction is opposite as sign expresses the direction.
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