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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?

  • physics -

    20 * 18 = 15 * 0 + 5 * v

  • physics -

    because
    momentum before = momentum after

  • physics -

    since there are no external forces on the system to change its momentum

  • physics -

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

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