PHYSICS 2.2

• Inertia


  The tendency of an object to resist a change in motion
• Newtons 1st law


  (Law of Inertia) an object in motion tends to stay in motion & an object at rest stays at rest unless acted upon by an outside force.
• Newtons 2nd law


  If forces are unbalanced, an object will accelerate in the direction of the resultant force
• Newtons 2nd law equation

  F=ma
• Resultant force


  The overall force on a point or object
• Forces acting on a falling object

  weight down and drag up (air or fluid resistance)
• Newtons 3rd law


  For every action force there is an equal and opposite reaction force
• mass


  the amount of matter in an object
• weight


  A measure of the force of gravity on an object
• weight unit


  Newtons
• mass units


  kg
• terminal velocity


  the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
• parachute jump graph

  
• air resistance units


  N