阿摩線上測驗
5. A 1000 kg car traveling north at 15 m/s collides with a 2000 kg truck traveling east at 10 m/s. The two vehicles move away from the impact point as one. What is the velocity of the wreckage just after impact?
(A)0m/s
(B) 8.3 m/s
(C)5.0 m/s
(D) 6.6 m/s
(E) 1.7 m/s
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統計： A(0), B(20), C(1), D(0), E(2) #3084464
統計： A(0), B(20), C(1), D(0), E(2) #3084464
