下面的物理题求详细解答。谢谢了! 物理题,求高手!!! (要详细解答,谢谢!!)
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P\uff08\u6700\u5927)=10000F/\uff08bc\uff09=220000/\uff0810*5\uff09=4400Pa
P\uff08\u6700\u5c0f\uff09=10000F/\uff08ab\uff09=220000/\uff0820*10\uff09=1100Pa
\uff084): F=40000Kg*10N/Kg=400000N
P=F/S=400000N/5m²=8X10^4Pa\uff1c7X10^5Pa
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\uff085\uff09\uff1aS=M/\u03c1=8.9Kg/(8.9X10^3Kg/m³)=0.001m³
F=Kg*g=8.9Kg*10N/Kg=89N
P=F/S=89N/0.001m³=8.9X10^4Pa
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题目中的“弹簧形变产生的力”,注意,这里主语是“弹簧”。
对于你的疑问
①力的作用是相互的,按照不同的方向,弹簧可以是受力物体也可以是施力物体
②弹簧发生了形变,它想要回到原来的状态,所以手阻止了这个过程。
。
你要仔细看题,说的是弹簧形变,就产生了向内的拉力,所以弹簧是施力物体
手向弹簧施加了向外的拉力
首先要明确这是“弹簧产生的力”所以,施力物体是弹簧。所以选答案B。
而A与C的施力物体分别是手和墙,所以都不对。
力有一个作用物和被作用物吧,题目写的“弹簧形变产生的力”,那么力的产生着也就是作用物不就是弹簧么,所以被作用物就是手喽。
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