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24 May 2010 09:12:54 IST
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A 40 kg shell is flying at a speed of 72 km/h.it explodes into two pieces,one piece of mass 15 k
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A 40 kg shell is flying at a speed of 72 km/h.it explodes into two pieces,one piece of mass 15 kg stops.calculate the velocity of the other piece.
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Initial velocity(u)=72kmph=20mps
initial momentum= m*u = (40*20)kg mps = 800kgmps
momentum of the 15kg mass=0
From coservation of energy,
initial momentum = total final momentum
thus momentum of the other piece=800kgmps
thus the speed of the other piece of mass 25kg= 800/25 mps = 32mps