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A bullet of mass 3.2 g strikes a ballistic pendulum of mass 3.6 kg. The center of mass of the pendulum rises a vertical distance of 13 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed.

  • Physics -

    you can only use conservation of momentum on the collision


    Now you can consider energy after the collision
    1/2 (3.6032)Vf^2=(3.6032)*9.8*.13

    in the second equation, solve for Vf, then put it in the first equation, and solve for Vi.

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