newtons laws

• what is newtons first law?

  a resultant force is required to change the motion of an object
• what is newtons second law?

  if a non-zero resultant force acts on an object, then it will cause the object to accelerate. the size of the resultant force is directly proportional to the acceleration it causes.
• what does non-zero mean?


  anything other than zero
• what is inertia?


  the tendency for the motion of an object to remain unchanged
• objects at ____ will stay at ____. objects in ______ will stay in ______.

  rest, motion
• what does an objects inertial mass measure?

  how difficult it is to change an objects velocity
• what is newtons third law?

  when two objects interact, the forces they exert on each other are equal and opposite
• in newtons third law what does equal and opposite refer to?

  equal = magnitude, opposite = direction
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