00:01
So hello everyone in this problem we learn about the archimedes principle which states that the power in submerged condition is equal to the amount of the water displaced by the body.
00:12
So we write down here and in this problem a situation is that the cubical box within a container is 50 % submerged condition and we have to add additional force to make sure the body will be fully submerged.
00:26
So if we draw this free body diagram, so we all know that there is a downward weight and bow and force always acts in upper direction.
00:43
And we have to add additional force here to make the body fully submerged.
00:55
So from force balance equation that is the summation of f equal to 0, we have the f x x external which is equal to bowen force minus the weight so first we interest in the bow and force so any force from newton's second law is m g so what is the m archimedes principle said that the bowen force always equal to the amount of water displaced by the body so what is m this is the volume into gravity into density.
01:42
So what is the volume for a cube? so a cube where a is the side of a cube.
01:53
And for the body here row is row w.
01:57
That is the density of water.
02:01
And we have the gravitational force...