Question

define Archimedes principle class 9​

Answer 1

Answer:

It's a a law stating that a body totally or partially immersed in a fluid is subject to an upward force equal in magnitude to the weight of fluid it displaces.

Answer 2

$\huge\underline\mathfrak{Archimede's\:Principle:-}$

It states that if a body is fully or partially immersed in a fluid at rest, it experience an upthrust (U) which is equal to the weight of the fluid displaced by it.

i.e. U = W

we know W = mg

V = volume of the fluid displaced

$\rho$= density of fluid

m = V$\rho$

So, W = V$\rho$g

=> U = V$\rho$g.

$\bold{\large{\boxed{\sf{\red{Applications\:of\:Archimede's\:Principle:-}}}}}$

• It is used in ship designing and making submarines.

• It is used in making hydrometer to measure density of water.

• It is used in making Lactometer to measure purity of milk.