游客
题文

如图所示,杠杆处于平衡状态,则F的力臂是
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

A.OA B.OC C.OD D.FD
科目 物理   题型 选择题   难度 较易
知识点: 探究杠杆的平衡条件实验
登录免费查看答案和解析
相关试题

【山东省青岛市2015年初中学业水平考试】(多)如图所示.水平桌面上两个相同的容器中分别装有深度相同的甲、乙两种液体,液体密度关系为ρ,则液体的质量m、液体对容器底部的压强p、容器对桌面的压力F,容器对桌面的压强p等关系,正确的是:()

A.m>m B.p底甲<p底乙 C.F<F D.p桌甲=p桌乙

【辽宁省大连市2015年中考物理试题】(多)如图所示,把装水的大烧杯放在水平升降台上,将一轻质玻璃杯倒扣在水中,玻璃杯内封闭一些气体,玻璃杯底用支架固定,支架在水中部分的体积忽略不计,水面都是静止的。将升降台缓慢升起一定高度(玻璃杯口没有接触大烧杯底部),水面静止后,下列说法正确的是

A.玻璃杯内的气体压强逐渐变大
B.玻璃杯外、内水面高度差变大
C.大烧杯底部内表面受到的压强变大
D.支架对玻璃杯的压力变小

【辽宁省锦州市2015年中考物理试卷】(多)下列说法中正确的是()

A.人潜入较深的水中时,必须穿潜水服,是因为液体压强随深度增加而增大
B.铲车宽大的轮子可以增大受力面积,减少对地面的压强
C.用吸管吸饮料时,是利用了嘴对饮料的作用力将饮料吸入口中
D.飞机升力的产生是由于机翼上下方的空气流速不同

【四川省眉山市2015年中考物理试卷】一物块轻轻放入盛满煤油的大烧杯中,静止后有160g煤油溢出;将其轻轻放入盛满水的大烧杯中,静止后有180g水溢出。已知煤油的密度是0.8×103kg/m3,则物块在水中静止时的状态及物块的密度分别是()

A.下沉,1.1×103kg/m3
B.漂浮,0.85×103kg/m3
C.悬浮,1.0×103kg/m3
D.漂浮,0.90×103kg/m3

【四川省雅安市2015年中考物理试题】两个底面积不等的圆柱形容器(S<S),分别盛有甲、乙两种不同的液体,将两个完全相同的小球分别放入这两种液体中,小球静止时的位置如图所示,此时两液面刚好齐平。若将这两小球从液体中取出,则液体对容器底部压强的变化量△p、△p的大小关系是

A.△p一定大于△p
B.△p一定等于△p
C.△p一定小于△p
D.△p可能小于△p

Copyright ©2020-2025 优题课 youtike.com 版权所有

粤ICP备20024846号