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Các dạng bài tập hay lạ khó chương DAO ĐỘNG CƠ HỌC có lời giải chi tiết

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c<br />

c: cm/s Ch n B.<br />

Câu 27.<br />

*Khi<br />

Ch n A.<br />

Câu 28.<br />

Ta <strong>có</strong>:<br />

Trong th<br />

c m t vòng.<br />

Góc quét ( u thu c góc ph IV).<br />

Ch n D.<br />

Câu 29.<br />

Gi s x M > 0, th<br />

ng v i góc<br />

quét

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