The only situation where it will not add weight is if both of these is true:
In the above case, the weight of the displaced water (the water that overflows) is equal to the weight of the freely floating ball. There is no net gain in weight. If the bucket is not initially full to the brim, or if the ball rests on the brim of the bucket without floating freely, then the ball will add weight.
No, I haven't. But, when the bucket is in the water, the weight is supported by the water in the well. Once the bucket is raised out of the water, the weight is no longer supported, and the full weight of the bucket and the water within the bucket is felt as it is raised towards the surface.
It depends on the bucket size, but usually a standard size bucket would hold a few litters of water.
To solve this problem, we need to understand the concept of buoyancy. When the bucket is half-filled with water, the water exerts an upward buoyant force equal to the weight of the water displaced. Since the weight of the half-filled bucket is 30kg, the weight of the water in the bucket is 30kg. This means the weight of the empty bucket is 20kg (50kg - 30kg = 20kg).
A gallon of water weighs about 8.34 pounds. If you have a good sized bucket with a gallon of water in it and you put a 5-pound fish in the bucket, you'll have a bucket that weighs about 13.34 pounds (plus the weight of the bucket). That's as long as the bucket doesn't overflow. The fish will (usually) be neutrally bouyant in the water, and it will be essentially weightless in that water. But its weight will add to that of the water in the bucket. No, it won't weigh 15 pounds, but it will weigh in as suggested. However, the weight of the water itself will not change.
to counterbalance the weight of the water bucket and make for easier lifting
When a bucket of water is submerged underwater, it displaces an equal volume of water. Because water is denser than air, the weight of the water it displaces is greater than the weight of the bucket of water itself, making the bucket feel lighter underwater.
It is easier to lift a bucket full of water underwater because the buoyant force acting on the submerged bucket reduces the effective weight you have to lift. This buoyant force is equal to the weight of the water displaced by the bucket, making it feel lighter to lift.
When the bucket is half full, it holds 4 kilograms of water. If it weighs 4.8 kilograms at this point, the empty bucket weighs 0.8 kilograms. Since the weight of the water is halved each time, a quarter full bucket would weigh 2.4 kilograms (0.8 kg + 2 kg).
No, a jar of water will not float to the bottom of a bucket of water. The jar will sink to the bottom due to its weight and density compared to the surrounding water.
pounds
A bucket of water is heavier than a bucket of tennis balls. This is because water has a higher density than tennis balls, meaning there is more mass packed into a given volume. The weight of an object is determined by both its mass and the gravitational force acting on it, so the bucket of water will weigh more than the bucket of tennis balls when measured on a scale.
A nail sinks in water because it is denser than water and displaces water which exerts an upward buoyant force equal to the weight of the water displaced by the nail, causing it to sink. The weight of the nail overcomes this buoyant force, making it sink to the bottom of the bucket.