Forces

The following topic has been broken down into 4 components. Click on the part you wish to learn about in more detail below.

What are ForcesNewtons 3 Laws of Motion
FrictionElectrostatics
GravityMagnetism

Topic Revision

There are some activities in BOLD throughout the different headings which you are encouraged to write revision notes about in your books.

Forces

  • A force is a push or a pull or a turn
  • List some examples of forces.
  • Balanced and unbalanced forces and calculate net force.
  • Forces can speed up, slow down or change the direction of an object.
  • Forces can be applied by Contact or Non-Contact (at a distance) and those applied at a distance have a field around them.
  • Forces have size and direction and are measured in Newtons (N)
  • Measure the size of forces.
Image result for force diagram
https://study.com/academy/lesson/using-force-arrows-in-physics-diagrams.html
Image result for contact non contact forces
Image result for forces are measured in newtonshttps://slideplayer.com/slide/9299459/

Frictional forces

  • Friction is a contact force which acts in the opposite direction to motion
  • Friction is both good and bad.
  • Identify where friction is good and technology is used to increase it
  • Identify where friction is bad and technology is used to decrease it
  • Importance of friction in everyday situations (starting and stopping)

Electrostatics

  • Describe ways objects become charged.
  • Identify the two types of charge (+ & -)
  • State the rules of attraction & repulsion.
  • Identify that there is a field around a charged object.
  • Draw diagrams of the effect of charged objects on each other
  • Give examples of everyday situations of electrostatic forces

Magnets

  • Identify the two types of magnetic pole (N & S)
  • State the rules of attraction & repulsion.
  • Define the term ‘field’ and identify the field around a magnet.
  • Draw magnetic fields around bar magnets
  • Describe the effect of magnetic poles on each other
  • Identify everyday uses of magnets and electromagnets

Gravity

  • Identify that all objects exert a force of gravity on all other objects
  • Identify examples of gravitation forces
  • Define mass and weight and the difference
  • Identify that gravity acts on us through a field.