什么？用纸也能烧水？

温度计居然也能自己做？

初中物理力学原理动图！

弹簧测力计的使用方法

力的作用是相互的

力使物体发生形变

重力方向总是竖直向下

测量不规则物体的重心的方法

影响滑动摩擦力大小的因素

探究阻力对物体运动的影响

探究二力平衡的条件

惯性

伽利略理想斜面实验

压强

压力的作用效果

探究影响液体压强的因素

连通器原理

托里拆利实验

活塞式抽水机的原理

探究流体压强

阿基米德原理

浮力的原理

探究浮力的大小跟哪些因素有关

探究浮力的大小和排开液体所受重力的关系

测量浮力大小

测量铝块浸没水中所受的浮力

盐水浮鸡蛋

密度计的使用

潜水艇原理

机械效率

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盛晴海5051弹簧测力计必须竖直向上拉物体吗 -
古国映18494322930 ______ 弹簧测力计必须竖直向上拉物体吗?测重力时,要竖直向上拉物体.测拉力时,不一定是竖直向上拉物体.可能是水平方向或某一倾斜的方向.

盛晴海5051这种弹簧测力计使用时必须竖直么?弹簧有一定的重量,如果竖直,和不竖直弹簧的伸长是不一样的, -
古国映18494322930 ______ 不是的 只要保证测力计的弹簧轴线方向和所测力的 方向一致就好 可以是竖直方向的 也可以是任意方向的 希望对你有帮助 不懂追问

盛晴海5051使用弹簧测力计测力时,拉力的方向必须在竖直方向吗?为什么? -
古国映18494322930 ______ 如果测量重力肯定是,弹簧的测量原理就是产生一个与要测量的力等大反向的力,即二力平衡

盛晴海5051弹簧测力计是不是只能竖直向下拉! -
古国映18494322930 ______ 只是测力的话,各个方向都可以,因为弹簧测力计依据的胡克定律并不随方向改变不过测重力的话就要竖直向下了补充:重力竖直向下,被测物体对弹簧的拉力竖直向下,手对弹簧的拉力竖直向上,且等于重力

盛晴海5051关于弹簧测力计的使用,下列说法错误的是( ) -
古国映18494322930 ______[选项] A. 弹簧测力计只能竖直放置,测竖直方向的力 B. 使用前必须检查指针是否对准零刻度线 C. 使用中要使弹簧测力计的受力方向沿弹簧的轴线方向 D. 不能用来测量超过它测量范围的力

盛晴海5051初三物理 使用弹簧测力计可以不必须竖直拉吗?
古国映18494322930 ______ 竖直是指与水平相垂直的方向.弹簧测力计是测量力的工具,使用时要使测力计内的弹簧轴线方向跟被测力的方向一致,弹簧不要靠在刻度盘上. 所以,测重力时,弹簧测力计必须竖直放置,因重力的方向是竖直向下的;测其它拉力时,弹簧测力计则不一定要竖直放置,此时则必须使测力计内的弹簧轴线方向跟被测拉力的方向一致了.

盛晴海5051关于弹簧测力计的使用,下列说法中错误的是( ) -
古国映18494322930 ______[选项] A. 弹簧测力计必须竖直放置,不得倾斜 B. 使用前必须检查零点是否校正,明确它的分度值 C. 使用过程中注意弹簧轴线方向与测力的方向一致 D. 使用时必须注意所测的力不能超过它的测量范围

盛晴海5051关于弹簧测力计的使用,下列说法中错误的是( ) -
古国映18494322930 ______[选项] A. 弹簧测力计只能竖直放置,测竖直方向的力 B. 使用前需要观察指针是否调零 C. 测量时要防止弹簧与外壳摩擦 D. 为使测量结果更加精确,必要时可以估读

盛晴海5051关于弹簧测力计的使用,下列几种说法中错误的是( ) -
古国映18494322930 ______[选项] A. 弹簧测力计必须竖直放置 B. 使用前必须检查指针是否在零刻度处 C. 使用时弹簧、指针、挂钩不能与外壳摩擦 D. 使用前必须观察它的量程范围和分度值

盛晴海5051使用滑轮时弹簧测力计是否一定要竖直向上拉动滑轮弹簧测力计是否一定要竖直向上禁止抄袭 -
古国映18494322930 ______[答案] 看你要哪种滑轮了 如果是动滑轮 只能竖直向上 如果是定滑轮 可以改变方向