Terms

• Velocity


  Distance travelled per unit time.
• Acceleration


  Change in velocity is divided by the time it takes for the change to occur.
• Speed


  The distance an object travels per unit of time.
• Motion


  An object's change in position relative to a reference point.
• Vector


  A quantity that has both magnitude and direction.
• Position


  The location of an object.
• Reference Point


  A place or object used for comparison to determine if an object is in motion.
• Distance


  An amount of space between two things or people.
• Time 


  The continuum of experience in which events pass to the past.
• Work


  Force exerted on an object that causes it to move.
• Mass


  A measure of the amount of matter in an object.
• Inertia


  The tendency of an object to resist a change in its motion.
• Momentum


  The product of an object's mass and velocity.
• Scalar 


  A physical quantity that has magnitude but no direction.
• Force


  The influence that can change the state, speed or position of an object. Another term is the push or pull on an object with mass that causes a change to its velocity.
• Newton's First Law Of Motion


  States that an object will remain at rest or will not change its speed or direction unless it is acted upon by an outside, unbalanced force.
• Newton's Second Law of Motion

  States that the acceleration of an object depends on the size of the next (total or resultant) force and the mass of an object.
• Newton's Third Law of Motion

  States that for every force that exists, a second force of equal size and opposite direction also exists. That is, when an object applies a force to a second object, the second object applies an equal and opposite force to the first object.
• Balanced Forces


  When two forces acting on an object are equal in magnitude and opposite direction, they cancel each other out. As a result, the object experiences no change in its motion and remains at rest or continues moving at a constant velocity.
• Unbalanced Forces


  When the forces acting on an object are unequal in magnitude or not opposite in direction, they result in a net force. This net force causes a change in the object's motion, resulting in acceleration or deceleration.
• Friction


  A force that opposes the motion of objects that are in contact with each other. It arises due to the interactions between the surfaces of the objects.
• Sir Issac Newton's Life

  • 1642-1727
  • Was an English, Mathematician, Physicist and Astronomer
  • Born in Lincolnshire, England
  • Attended Trinity College, Cambridge