3.如圖所示,曲線是某個(gè)質(zhì)點(diǎn)在恒力作用下運(yùn)動(dòng)的一段軌跡。質(zhì)點(diǎn)從A點(diǎn)出發(fā)經(jīng)B點(diǎn)到達(dá)C點(diǎn),已知弧長AB等于弧長BC,質(zhì)點(diǎn)由A點(diǎn)運(yùn)動(dòng)到B點(diǎn)與從B點(diǎn)運(yùn)動(dòng)到C點(diǎn)的時(shí)間相等。下列說法中正確的是( ?。?/div>
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發(fā)布:2024/10/4 4:0:1組卷:11引用:2難度:0.7