14. A 5.0 kg package is moving at a speed of 20.0 m/s vertically upward when it explodes into threе fragments: a 1.00 kg fragment is shot upward with an initial speed of 10.0 m/s and a 2.00 kg fragment is shot horizontally with an initial speed of 10.0 m/s. What is the total kinetic energy provided by the explosion?
(A) 8.0 x 102J
(B) 5.7 x 102 J
(C) 2.8 x 103 J
(D) 1.3 x 103 J
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統計: 尚無統計資料
統計: 尚無統計資料