Newton's laws

Isaac Newton (British, 1642-1727) proposed three laws that helped explain how he saw the world.

  • NI: A body at rest will stay at rest unless there is a force on it. A body in motion will stay in motion unless there is a force on it.
  • NII: The acceleration of a body is directly proportional to the force acting on it.
  • NIII: For every action there is an equal and opposite reaction.

    Great. So what does this mean?

    Next

    Back to Lecture 9 outline

    Back to main lectures page

    Back to main course page