1 1 1 0 + m ( 6gR ) = mgR + mV = mg ( 2R ) + mV M M 1 1 ..3mgR = mgR + mV = 2mgR + 2 2 M R mV 、 V = ( bgR m P .動能。= 2mgR ,動能= mgR V = V4gR , V = C2gR ...
確定! 回上一頁