PHYSICS

ARCHIMEDE

S LAW

BY : NURUL SYAZWANI

IZZATI BT KHAIRI (409)

The principle states that :

“ The buoyant force acting

on an object completely

submerged in water

equals the weight of the

displaced water “

WHAT IS BUOYANCY

OR UPTHRUST ?

BOUYANCY

The property of the fluids to apply

buoyant force

 

UPTHRUST OR BOUYANCY

FORCE

the force acting upward to

reduce the actual weight of

the objectwhen it is under

water

TWO FACTORS OF BUOYANT FORCE

The volume of the

body immersed i.e.

volume of the fluid

displaced ,or

density of the fluid

MATERIALS REQUIRED FOR VERIFYING ARCHIMEDES PRINCIPLE ARE :

EUREKA CAN

STONE

SPRING BALANCE

BEAKER

DENSITY AND BUOYANCY FROM ARCHIMEDES’S

PRINCIPLE

Buoyant Force = Weight of fluid

displaced = mg = ρVg (note : F = ma)(note : ρ = m∕V )

Thus FB= ρ V gWhere ……FB= Buoyant Force or Upthrustρ = Density of fluidV = Volume of fluid displaced or

the volume of the object that immersed in the fluid.

BUOYANT FORCE AND FLOATATION

Buoyant force = weight ⇒ the object floats and stationary

Buoyant force > weight ⇒ the object moves up

Buoyant force < weight ⇒ the object moves down

THE LAW OF FLOATATION

A floating object

displaces its own

weight of fluid

which it floats.

APPLICATIONS

HOT AIR BALLOON

SUBMARINE

SHIPSFISHES