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    • displacement
      • Distance in a given direction.
    • What is the difference between a vector and a scalar quantity?
      • vectors have direction as well as a magnitude.
    • what is newtons third law of motion?
      • When two objects interact they exert equal and opposite forces onto each other.
    • what is newtons first law of motion?
      • If the forces acting on an object are balanced, then the resultant force should equal zero.
    • what is meant by resultant force?
      • The sum of all the forces acting on an object.
    • what is meant by the centre of mass?
      • The point on an object where its mass is the most concentrated.
    • why do we use a parallelogram of forces?
      • To find the resultant of two forces which don't act along the same line.
    • how to calculate distance travelled?
      • The speed multiplied by the time.
    • To find the speed of the object at any given time.
      • To find the speed of the object at any given time.
    • state the equation for acceleration
      • Change in velocity/time taken.
    • what is velocity?
      • Speed in a given direction.
    • what is deceleration?
      • The change in velocity per second as an object slows down.

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