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10.47. Una barra metlica delgada y uniforme, de 2.00 m de longitud y con un peso de 90.0 N, cuelga verticalmente del techo en

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10.47. Una barra metlica delgada y uniforme, de 2.00 m de longitud y con un peso de 90.0 N, cuelga verticalmente del techo en un pivote sin fricci6n colocado en el extremo superior. De repente, una pelota de 3.00 kg, que viaja inicialmente a 10.0 m>s en direcci6n horizontal, golpea la barra 1.50 m abajo del techo. La pelota rebota en direcci6n opuesta con rapidez de 6.00 m>s. a) Calcule la rapidez angular de la barra inmediatamente despus del choque. b) Durante el choque, ipor qu se conserva el momento angular pero no el momento lineal?

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