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| Experimental components |
A semi-transparent plastic cup, a graduated cylinder, a float, a weight, and a force gauge |
| Experimental process | 1. First, use the force gauge to measure the mass G1 of the float and the weight hanging below it. 2. Fill the semi-transparent plastic cup with water. 3. Hang the float on the force gauge, then hang the weight below the float, and then place the float in the large semi-transparent plastic cup filled with water. At this point, you will observe that the value of the force gauge gradually decreases as the weight-loaded float sinks until the weight is completely submerged in water. Read the value of the force gauge G2. From this, you can calculate the buoyancy force F = G1 - G2 on the weight. 4. From the graduated cylinder, you can read that the volume of water that overflows is V1 and its mass is G3. |
| Experimental phenomena | The weight of the water that overflows is equal to the buoyancy force on the object. |
| Experimental conclusion | An object immersed in a static fluid (gas or liquid) is subject to a buoyancy force, which is equal to the weight of the fluid displaced by that object. |
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