问题
填空题
将重为4N的物体放入到一个足够大的装满水的杯中，溢出水300 g，物体静止时的状态是_______（漂浮／悬浮／沉底），物体受到的浮力是_______N．
答案
沉底，3
由题知，物体受到水的浮力：
F浮=G排=G溢=m溢g=0.3kg×10N/kg=3N，
∵G物=4N，
∴F浮＜G物，
∴物体在水中下沉，当静止时，物体沉底
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将重为4N的物体放入到一个足够大的装满水的杯中，溢出水300 g，物体静止时的状态是_______（漂浮／悬浮／沉底），物体受到的浮力是_______N．
沉底，3
由题知，物体受到水的浮力：
F浮=G排=G溢=m溢g=0.3kg×10N/kg=3N，
∵G物=4N，
∴F浮＜G物，
∴物体在水中下沉，当静止时，物体沉底
| 交际运用。 | |
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