C.先增大,后减小
D.先减小,后增大
6.一弹簧振子作简谐振动,初始时具有动能0.6J,势能0.2J。1.5个周期后,弹簧振子振动的总能量E=( )
A.0.2J B.0.4J
C.0.6J D.0.8J
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C.先增大,后减小
D.先减小,后增大
6.一弹簧振子作简谐振动,初始时具有动能0.6J,势能0.2J。1.5个周期后,弹簧振子振动的总能量E=( )
A.0.2J B.0.4J
C.0.6J D.0.8J
[上一页] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [下一页]