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March 29, 2017

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a 1.75kg pistol lies at rest on an essentially frictionless bench. it accidentally fires and shoots a 25 gram bullet parallel to the bench. How far has the bullet moved by the time the gun has recoiled 2.60mm?

  • Physics - ,

    the velocityies of the bullet and the gun are proportional to the ratio of masses.

    Vbullet/vgun= massgun/massbullet

    now, in the same time, the distances are proportional to velocities, so

    distancebullet/distancegun= massgun/massbullet

    so go figure.

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