物理广西壮族自治区考阅评南宁部分学校2025年春季学期高一年级期末教学质量监测（6.30-7.1）

高一物理答案123456789DCCACDB\d\d52gdgd【详解】（2）[2]设频闪照片的照相间隔为T，根据Δy=gT2有d=gT2121）B（2）0.98（3）0.25；0.24（4）D【详解】（3）从开始下落到C点的过程中，重力势能的减小量为ΔEp=mgΔhΔEp=0.25J（保留两位有效数字）根据.................................................................................... ....................................................................................................解得.......................................................................则有.........................................................................................................................................................解得..................................................................可知，太阳对行星的作用力F与r的平方成反比..............................141）1.4m/s22）0.72m3）640N【详解】（1）对龙舟分析又牛顿第二定律，有：20F'sinθ-0.1Mg=Ma..牛顿第三定律：F=F'...........................................................................解得a=1.4m/s2........................................................................................（2）划桨一次，对龙舟动能定理，有：20F's1sinθ-0.1Mgs=0...............解得：s=0.72m.........................................................................................................15.（1）2.4m2）340N，方向竖直向上（【详解】0则有tan37O=.....................0解得vAy=6m/s则台面到A点的高度为............................................................................................水平台面的高度为h=h1+L1sin37O.h=2.4m............................................................................................................................mg(h2R1)μmgL2=mvmv.............................................................................物块经过D点时，根据牛顿第二定律可得........................................解得FN=340N................................................................................................................................................1分.....................................................................................解得s1=55m设物体经过E点后刚好到达圆心等高处，mg.2R................................................解得s2=53m设物体经过E点后刚好经过最高点F，则有....................................联