Definition Of Force And Pressure

Pressure is defined as a measure of the force applied over a unit area.

Definition of force and pressure. It is the force acting perpendicular to the surface of the object causing the force to spread over a certain area. Force is measured in units of newtons n named after the famous scientist isaac newton. I when we cut an apple we need to use the sharp edge of the knife instead of. This is the reason that the area of one end of a nail is pointed to exert sufficient pressure and other end is bigger as shown in the image given below.

The lesson covers the complete explanation of class 8 chapter 11 force and pressure. Pressure is defined as the force exerted on a surface divided by the area over which that force acts. Force and pressure class 8 science chapter 11 as per ncert book used in cbse and other schools. Topics covered are force and types of force fluids and fluids pressure.

Pressure is often expressed in units of pascals pa newtons per square meter n m 2 or kg m s 2 or pounds per square inch other units include the atmosphere atm torr bar and meters sea water msw. The force applied on a unit area of a surface is known as pressure pressure force area on which it acts. If the area is smaller then the pressure on a surface would be greater. Therefore pressure considers the area over which the force is exerted i e.

Pressure force area from above formula we can say that with same applied force pressure is indirectly proportional to the area thus pressure decreases with increase in area and increases with decrease in area. Pressure is the amount of force applied on a surface per unit area. The lesson covers all important questions based on force and pressure.