# physics

A BLOCK OF MASS 20KG MOVING WITH A SPEED OF 18 KM/H EXPLODES AND SPLITS INTO 2 PARTS.ONE PART OF MASS 15 KG COMES TO REST FIND THE VELOCITY OF SECOND PART?

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1. 20 * 18 = 15 * 0 + 5 * v

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posted by Damon
2. because
momentum before = momentum after

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posted by Damon
3. since there are no external forces on the system to change its momentum

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posted by Damon
4. 20*18=15*0+(20-15)*x
360=0+5*x
x=360/5
velocity of the other part=72

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posted by kabilan

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