Floatation depends upon the density. If an object has density less than the density of water, it floats. Principle of floatation is stated by the Archimedes. This chapter deals with what is floatation, laws of floatation, its applications and examples.

Thrust and Pressure

Force acting on an object perpendicular to the surface is called thrust.

Effect of thrust depends on the area of contact.

The pressure is thrust per unit area.

SI unit is the pascal (Pa).

Force acting on a smaller area applies more pressure than the same force acting on a larger area.