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1、標(biāo)準(zhǔn)化作業(yè)（1）2.已知某簡(jiǎn)諧振動(dòng)的振動(dòng)曲線如圖所示，位移的單位為厘米，時(shí)間單位為秒．則此簡(jiǎn)諧振動(dòng)的振動(dòng)方程為：(A)(B)(C)(D)(E)［］C一、選擇題1.一質(zhì)點(diǎn)作簡(jiǎn)諧振動(dòng)．其運(yùn)動(dòng)速度與時(shí)間的曲線如圖所示．若質(zhì)點(diǎn)的振動(dòng)規(guī)律用余弦函數(shù)描述，則其初相應(yīng)為(A)p/6．(B)5p/6．(C)-5p/6．(D)-p/6．(E)-2p/3．［］CEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-201
2、1AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.二、填空題3.一物體作簡(jiǎn)諧振動(dòng)，其振動(dòng)方程為(1)此簡(jiǎn)諧振動(dòng)的周期T=__________________；(2)當(dāng)t=0.6s時(shí)，物體的速度v=__________________．(SI)．1.2s－20.9cm/s三、計(jì)算題5.一物體作簡(jiǎn)諧振動(dòng)，其速度最大值vm=3×10-2m/s
3、，其振幅A=2×10-2m．若t=0時(shí)，物體位于平衡位置且向x軸的負(fù)方向(3)振動(dòng)方程的數(shù)值式．運(yùn)動(dòng).求：(1)振動(dòng)周期T；(2)加速度的最大值am；4解:(1)vm=ωA∴ω=vm/A=1.5s-1∴T=2π/ω=4.19s(2)am=w2A=vmw=4.5×10-2m/s2(3)x=0.02(SI)Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evalua
4、tiononly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.6.質(zhì)量為2kg的質(zhì)點(diǎn)，按方程沿著x軸振動(dòng)．求：(1)t=0時(shí)，作用于質(zhì)點(diǎn)的力的大??；(2)作用于質(zhì)點(diǎn)的力的最大值和此時(shí)質(zhì)點(diǎn)的位置．(SI)解:(1)t=0時(shí)(2)此時(shí)質(zhì)點(diǎn)最大位移處即Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Co
5、pyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.標(biāo)準(zhǔn)化作業(yè)（2）一、選擇題1.一質(zhì)點(diǎn)在x軸上作簡(jiǎn)諧振動(dòng)，振輻A=4cm，周期T=2s，其平衡位置取作坐標(biāo)原點(diǎn)．若t=0時(shí)刻質(zhì)點(diǎn)第一次通過(guò)x=-2cm處，且向x軸負(fù)方向運(yùn)動(dòng)，則質(zhì)點(diǎn)第二次通過(guò)x=-2cm處的時(shí)刻為(A)1s．(B)(2/3)s．(C)(4/3)
6、s．(D)2s．［］2.圖中所畫(huà)的是兩個(gè)簡(jiǎn)諧振動(dòng)的振動(dòng)曲線．若這兩個(gè)簡(jiǎn)諧振動(dòng)可疊加，則合成的余弦振動(dòng)的初相為(A)(B)(C)(D)0［］xtOA/2-Ax1x2BBEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyr
7、ight2004-2011AsposePtyLtd.二、填空題3.一簡(jiǎn)諧振動(dòng)的旋轉(zhuǎn)矢量圖如圖所示，振幅矢量長(zhǎng)2cm，則該簡(jiǎn)諧振動(dòng)的初相為_(kāi)___________．振動(dòng)方程為_(kāi)_____________________________．4.兩個(gè)同方向同頻率的簡(jiǎn)諧振動(dòng)，其振動(dòng)表達(dá)式分別為：(SI)，(SI)它們的合振動(dòng)的振輻為_(kāi)____________,初相為_(kāi)___________．p/4(SI)(SI)Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientP
8、rofile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.三、計(jì)算題一質(zhì)點(diǎn)在x軸上作諧振動(dòng)，選取該質(zhì)點(diǎn)向右運(yùn)動(dòng)通過(guò)A點(diǎn)時(shí)作為計(jì)時(shí)起點(diǎn)（t=0
