2022年安庆市示范高中高三联考试题(测试试卷)文科综合答案

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9.解:(1)上滑过程中对物块进行受力分析,当F=mosin37 umgcos37°=10N,即物块沿斜面上滑的位移为x1=1m时速度最大.(1分)根据动能定理得2 mum= WaT ngT sins37°-pmgx1Cos37(2分)F-x图线所围的面积表示功Wn=(20 10)×12J=15J(1分)代入解得物块在上滑过程中的最大速度的大小v10m/s(2分)(2)设物块沿斜面上滑的最大位移为xm,根据能量守恒定律得Wn= mg Im sin37° umg Im cOS.37(1分)其中Wr==220×2J=20J(1分)解得物块沿斜面上滑的最大位移的大小xm=2m(1分)由于 mosin0> amcos0,故物块不能在斜面上静止,物块最后静止于挡板处,设物块在斜面上运动的总路程为s,根据动能定理Wp- amcos·s=0(1分)解得物块在斜面上运动的总路程s=5m(2分)

读后写Tom noticed the flame was reaching up. Frozen witfear, he stood rooted to the spot and held Jane's hatightly. Both of them were coughing heavily. Time seeto stand still, though they were probably there for onltwo or three minutes. Tom begged Jane to run for safetyas quickly as possible. Jane tried to protect her nose fithe choking smoke and shook her head. She bit againstdoor again and again.Luckilysomeneighbors passing by stoppoffered help. A sense of strength immediately replacedfear and anxiety in Jane's mind. She told them MsMakcil must be still in the room. They forced theopen with all their strength. Sure enough, Makeikinside the room, lying in bed, unconscious. Shecarried downstairs and then rushed to the hospital, whershe finally came to herself. People in the neighborhood felieved and Jane and Tom were very happy.读后写Tom noticed the flame was reaching up. Frozen witfear, he stood rooted to the spot and held Jane's hatightly. Both of them were coughing heavily. Time seeto stand still, though they were probably there for onltwo or three minutes. Tom begged Jane to run for safetyas quickly as possible. Jane tried to protect her nose fithe choking smoke and shook her head. She bit againstdoor again and again.Luckilysomeneighbors passing by stoppoffered help. A sense of strength immediately replacedfear and anxiety in Jane's mind. She told them MsMakcil must be still in the room. They forced theopen with all their strength. Sure enough, Makeikinside the room, lying in bed, unconscious. Shecarried downstairs and then rushed to the hospital, whershe finally came to herself. People in the neighborhood felieved and Jane and Tom were very happy.