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範例:斜向拋體爆炸

質量為1kg之物體,在地面上作斜向拋射,在最高點之動量大小恰為拋出時之4/5,最大高度0.45。若在最高點突然爆炸成質量相等之兩塊,其中一塊垂直自由落下,則下列各項中,何者不正確? (A)拋射斜角為37o (B)拋射初速為5m/sec (C)著地時兩塊相距2.4 (D)著地時兩塊動量大小比為 (E)自拋出至最高點(尚未爆炸),物體所受的衝量大小為4N-sec(g=10 m/s2)83雄中】

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Posted in 多質點系統的質心運動.

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