初中物理力和机械测试题
下面小编给大家带来初中物理力和机械测试题,本文共8篇,希望能帮助到大家! 有关初中物理力和机械测试题 1.“失重”与“超重” 地球周围物体都受到重力的作用,这是由于地球对物体的吸引而造成的.如果物体在空中只受重力的作用,则物体在重力作用下会做自由落体运动——竖直地,愈来愈快地落向地面. 在用弹簧测力计称物重时,物体挂在弹簧测力计上,对支持它使之不下落的弹簧测力计有一个力的作用,弹簧伸长了.由于这个
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