Wednesday, January 12, 2011

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.

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