Force and Pressure
par NURLIYANA BTE MOHD GHAZALI .
1. Unit of force
1.1. Newton (N)
2. Different types of forces
2.1. Elastic Spring Force
2.2. Gravitational Force
2.2.1. Exists between any two objects
2.2.2. This is the force that causes object to be attracted to the Earth.
2.3. Magnetic Force
2.3.1. Force exerted by a magnet on a magnetic material or another magnet.
2.3.2. Bar magnet have two poles.
2.3.2.1. North-seeking pole
2.3.2.2. South-seeking pole
2.3.3. Forces between magnets
2.3.3.1. Like poles repel: Magnets push away from one another
2.3.3.1.1. New node
2.3.3.2. Unlike poles attract: Magnets pull towards each other
2.4. Frictional Force
2.4.1. Occurs when two moving objects are in contact
2.4.2. Effects
2.4.2.1. Stops and slows down a moving object
2.4.2.2. Produces heat
3. Pressure is the force acting per unit area.
3.1. Pressure increases when
3.1.1. The force increases
3.1.2. The area decreases
4. Calculating Pressure
4.1. Formula
4.1.1. Force / Area
4.2. SI Unit
4.2.1. N/m2
4.2.2. Pascal (Pa)