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Kaxa2000
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If you suspend a large object beneath surface of a lake...it seems to weigh less than if it was above...why is this? Would it become even lighter if you kept lowering it into the water?
The object's weight is offset by the weight of water it displaces. If the object is 1 cubic metre, it will displace 1000kg of water. That 1000kg of water will try to push its way back into the space occupied by the object. In doing so, it will push up on the object with a force of 1000kg.Kaxa2000 said:If you suspend a large object beneath surface of a lake...it seems to weigh less than if it was above...why is this? Would it become even lighter if you kept lowering it into the water?
Why is a very good question.Kaxa2000 said:..why is this?
No - assuming the density of the water doesn't changeWould it become even lighter if you kept lowering it into the water?
When an object is submerged in water, it displaces an amount of water equal to its own volume. This creates an upward force, known as buoyancy, which acts against the object's weight. This results in a net upward force, causing the object to feel lighter.
An object's weight, or the force of gravity acting on it, does not change when submerged in water. However, the buoyant force acting on the object counteracts its weight, making it feel lighter.
Yes, the density of an object plays a significant role in its buoyancy in water. Objects with a higher density than water will sink, while objects with a lower density will float. This is due to the fact that the buoyant force is greater on an object with a lower density, causing it to float.
Yes, there is a limit to how light an object can feel under water. As the object is submerged deeper, the water above it exerts more pressure, which in turn increases the buoyant force acting on the object. Eventually, the buoyant force will equal the object's weight, causing it to stop feeling lighter and instead feel weightless.
Yes, the shape of an object can affect its buoyancy in water. Objects with a larger surface area will displace more water, resulting in a greater buoyant force. This is why objects with a larger surface area, such as a boat, can float on water even if they are denser than water.