Archimedes’ Principle

 

According to Archimedes’ Principle, an object wholly or partially immersed in liquid experiences up thrust that is equal to the weight of liquid displaced by object.

Therefore, Up thrust =   wight of object in air – wight of object in liquid

                                     =  wight of liquid displaced

Law of floatation: It’s a special case of Archimedes’ Principle according to which to float a body on liquid it should displace same amount of liquid as its weight.

Or to float a body on water, weight of body = weight of water displaced