Answered

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IV.- Una bala de 20 gr que se mueve a 400 m/s golpea un bloque de madera de 10 kg que
está detenido, la bala atraviesa el bloque por completo y sale del otro lado con una
velocidad de 10 m/s. Cuál es la velocidad del bloque después del choque. ¿Cuánta
energía perdió?