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Forces in Fluids Textual Questions and Answers 1. Take water in a bucket. Place a tightly closed bottle on it. What do you observe? Ans: Bottle floats on water surface 2. Immerse the plastic bottle to the bottom of the bucket. Don’t you have to exert a force? Why is it so? Ans: It is because water exerts an upward force 3. Leave the bottle free. What do you observe? Ans: Bottle rises to the surface of water. 4. When an object in water is lifted, what happens? What can be the reason? Ans: When an object in water is lifted, its weight appears diminished, when compared to that in air. It is because water exerts an upward force on a body placed in it. Fluids : Liquids and gases together are generally called fluids. Buoyancy : When a body is immersed completely or partially in a liquid, the liquid exerts an upward force on the body. This force is the buoyancy. 5. Tabulate some situations in your daily life where buoyant forces are experienced in liquids and gases. Ans: A hydrogen-fill...