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WEEK 8:
TOPIC: EQUILIBRIUM OF BODIES IN LIQUIDS
CONTENT:
- Concept of Upthrust
- Archimedes Principle
- Density & Relative density
- Principle of flotation
EQUILIBRIUM OF BODIES IN LIQUIDS
Boat, ship or a swimmer can float on water. This is as a result of certain forces acting on these bodies.
The force U is called the upthrust.
Upthrust can be defined as an upward force experience by object in a fluid.
Upthrust can also be defined as the loss weight experienced by an object partial or completely immersed in a fluid. for object floating in a fluid,
W = U
For object partly or wholly immersed in a fluid, (e.g bucket of water inside the water in a well weight lighter than)
U = weight loss
Consider a bucket of water of weight W in a well which is held by a string whose tension is T. When the bucket is above the water in the well, the tension in the string equals the weight of the bucket. (W = T)
When the bucket is inside the well, it experiences a weight loss which equal to the difference (W – T)
Upthrust {U = W – T………… (i)}
Where W is the weight of the bucket in air and T is the bucket in the well/fluid.
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