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physics

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a bullet fired into a fixed target loses half of its velocity in penetrating 15cm.how much further will it penetrate before coming to rest?
options:
1.5cm
2.15cm

  • physics -

    3/4 of the initial kinetic energy is used up going the first 15 cm. There is enoough left to penetrate 1/3 as far (5 cm). This assumes that the force resisting penetration is constant.

  • physics -

    15

  • physics -

    i think it should be 1/3rd if 15 i.e. cm but not sure...
    i also don't know correctly but if anyone knows please let me know....

  • physics -

    5cm

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