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abdul_shabeer

  • 4 years ago

A bullet of mass A and velocity B is fired into a block of wood of mass C. If loss of any mass and friction be neglected, the velocity of the system must be______

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  1. asnaseer
    • 4 years ago
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    use conservation of momentum

  2. abdul_shabeer
    • 4 years ago
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    (a) AB/(A+C) (b) (A+C)/(B+C) (C) AC/(B+C) (D) (A+B)/AC

  3. asnaseer
    • 4 years ago
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    what is the momentum before the collision?

  4. asnaseer
    • 4 years ago
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    do you know how to calculate momentum?

  5. abdul_shabeer
    • 4 years ago
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    AB

  6. asnaseer
    • 4 years ago
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    correct - now what is the momentum after the collision - call the velocity of the system after the collision V

  7. jimmyrep
    • 4 years ago
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    yep

  8. abdul_shabeer
    • 4 years ago
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    V(A+C)

  9. asnaseer
    • 4 years ago
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    correct - now just equate the two and solve for V

  10. jimmyrep
    • 4 years ago
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    right again

  11. asnaseer
    • 4 years ago
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    momentum before collision = momentum after collision

  12. abdul_shabeer
    • 4 years ago
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    Thanks a lot

  13. asnaseer
    • 4 years ago
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    yw

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