If by 'upthrust' you mean buoyancy, the terms 'positive buoyancy', 'negative buoyancy', and 'neutral buoyancy' have specific meanings in this context.MBBphys said:Homework Statement
Object immersed in fluid.
If weight larger than upthrust, it sinks. If less, it floats. If weight equal to upthrust, it floats, right?
Thanks!
Homework Equations
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The Attempt at a Solution
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Upthrust, also known as buoyant force, is the force that pushes an object upward when it is immersed in a fluid. It is caused by the pressure difference between the top and bottom of the object.
Weight is the force exerted on an object by gravity. It is the product of an object's mass and the acceleration due to gravity.
Upthrust and weight are equal in magnitude when an object is fully immersed in a fluid and at rest. If upthrust is greater than weight, the object will float. If weight is greater than upthrust, the object will sink.
Upthrust is affected by the density of the fluid, the volume of the object, and the depth at which the object is immersed. Weight is affected by the mass of the object and the strength of the gravitational field.
Understanding the relationship between upthrust and weight is important in determining whether an object will float or sink in a fluid. It is also essential in designing ships, submarines, and other objects that need to float or sink in water. Additionally, understanding upthrust and weight can help explain other phenomena, such as why some objects feel lighter when submerged in water.