《功和機(jī)械能》單元檢測(cè)題三（參考資料）

1、.?功和機(jī)械能?單元檢測(cè)題三參考資料DIV.MyFav_1326680400369 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; COLOR: windowtext; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1326680400369 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; COLOR: windowtext; FONT-FAMILY: Times New R

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8、h; FONT-SIZE: 10.5pt; COLOR: windowtext; FONT-FAMILY: 宋體; TEXT-ALIGN: justifyDIV.MyFav_1326680400369 DIV.MsoPlainTextTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; COLOR: windowtext; FONT-FAMILY: 宋體; TEXT-ALIGN: justifyDIV.MyFav_1326680400369 PFONT-SIZE: 12pt; MARGIN-LEFT: 0cm; COLOR: black; MARG

9、IN-RIGHT: 0cm; FONT-FAMILY: 宋體DIV.MyFav_1326680400369 SPAN.CharChar1FONT-FAMILY: 宋體DIV.MyFav_1326680400369 DIV.Section1page: Section1一、選擇題此題共15小題，每題3分，共45分。每題只有1個(gè)選項(xiàng)符合題意，把正確選項(xiàng)前面的字母填在題干后的括號(hào)內(nèi)，選對(duì)的得3分，多項(xiàng)選擇、錯(cuò)選均不得分題號(hào)123456789101112131415答案ABBBCACABBADADB二、填空題此題21空，每空1分，共21分16大 小172018減小 減小19罐子從斜面滾下后又返回 重力勢(shì)

10、能、動(dòng)能與彈性勢(shì)能的互相轉(zhuǎn)化20彈性勢(shì)能 動(dòng)能 重力勢(shì)能21重力勢(shì)能勢(shì)能、機(jī)械能 動(dòng)能或機(jī)械能22500 150232.0 1.8 902480 變大255J 80三、實(shí)驗(yàn)探究與設(shè)計(jì)題第26小題7分，第27小題11分，共18分261大；2質(zhì)量。控制了質(zhì)量不同的小球滑到水面上時(shí)具有相等的速度；3速度。質(zhì)量一定時(shí)，小球的速度越大動(dòng)能越大。271勻速 左；260 3.0； 3A 在其它條件一樣時(shí)，斜面的傾斜程度越大，斜面的機(jī)械效率越高或大；或在其它條件一樣時(shí)，斜面的機(jī)械效率與斜面的傾斜程度有關(guān)；4控制變量法；5斜面的粗糙程度、木板的長(zhǎng)度、拉木塊速度、木板的面積等合理均可得分四、計(jì)算題第28 小題8分，第29小題8分，共16分281車(chē)胎能承受的最大壓力是。那