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Energy and change

Natural Sciences

After this lesson, you should be able to:

  • Describe a force as a push or a pull or a twist exerted upon an object
  • Force is measured in newtons (N)
  • List some effects of forces on objects on which they act
  • Classify forces into contact and non-contact and give examples
  • Distinguish between normal force, force of friction and tension force
  • Know that gravitational forces are non-contact forces
  • Link balanced and unbalanced forces to the state of motion of an object
  • Identify action-reaction pairs of forces
  • Draw simple force diagrams


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