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如图,一个半径为10米的水轮按逆时针方向每分钟转4圈,记水轮上的点P到水面的距离...
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如图,一个半径为10米的水轮按逆时针方向每分钟转4圈,记水轮上的点P到水面的距离为d米(P在水面下则d为负数),则d(米)与时间t(秒)之间满足关系式:d=Asin(ωt+φ)+k(A>0,ω>0),
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<φ<
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,且当P点从水面上浮现时开始计算时间,有以下四个结论:
(1)A=10;
(2)ω=
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;
(3)φ=
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;
(4)K=5,
则其中所有正确结论的序号是
.
考点分析:
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