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27 October, 22:00

Una granada de 4kg inicialmente en reposo, estalla en dos trozos, uno de los cuales, de 2.5kg sale disparado hacia la derecha a 120m/s. Calcula la velocidad y el sentido del movimiento del segundo trozo.

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  1. 27 October, 23:19
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    According to google translate

    reservation of momentum

    momentum before = after

    0 = momentum of piece to the right + 2nd one

    0 = 2.5 (120) + (4-2.5) v

    v is negative so it moves to the left
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