Some types of Force

• GRAVITY: is the force that pulls objects downwards towards the centre of the Earth.
• UPTHRUST: is the force that pushes an object up and makes it seem to lose weight in a fluid. It is known as Archimedes' principle of flotation.
• FRICTION: is the resistance between two surfaces that are in contact with each other.
• AIR RESISTANCE: it is a force that pushes against things which are moving.
• TURNING FORCES: We use different forces (turn, push, pull) to turn something round.
• PRESSURE: is the force that acts on a unit area of surface. Pressure=Force/Area.
• BALANCED FORCES: When things are not moving, the forces are balanced.
• UNBALANCED FORCES: Unbalanced forces are needed to make things change movement and direction.