GCSE Physics (AQA)

Topic Summaries

Gravity and Newton's Laws

Newton’s Third Law

  • Newton’s third law states that if an object exerts a force on another object, that object will exert an equal and opposite force, of the same type, on the first.
  • Examples of Newton’s third law in action:
    • When an object is pulled towards Earth by gravity, the object is also pulling the Earth towards it.
    • When two charges repel or attract, they both experience the same force towards or away from each other.
    • When you stand on a floor, the floor exerts an upward reaction force that is equal to your weight pushing down on it.

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