查看完整版本 : 力學問題

ken0051102 2012-11-27 10:48 PM

力學問題

[img]http://thisjpg.hkgimg.com/hBc.jpg[/img]
可唔可以比個呢3 part ans我:smile_27:

↗亢龍無悔↙ 2012-11-28 12:07 PM

a) m g sin 10 = f
b) P = F v, v can be found by using displacement / time
c) output power / input power x 100% = efficiency, using (b), input power can be found
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查看完整版本: 力學問題