1.4.B—Describe the motion of objects as measured by observers in different inertial reference frames

Describe the motion of objects as measured by observers in different inertial reference frames.

• Measurements from a given reference frame may be converted to measurements from another reference frame.
• The observed velocity of an object results from the combination of the object’s velocity and the velocity of the observer’s reference frame.
  • i. Combining the motion of an object and the motion of an observer in a given reference frame involves the addition or subtraction of vectors.
  • ii. The acceleration of any object is the same as measured from all inertial reference frames.