Motion

How to Describe an Object in Motion

• To describe an object’s motion, you must be able to describe its position relative to a reference frame

  • reference frame: a set of coordinates that can be used to determine positions and velocities of objects in that frame

  • ex: the Earth

Speed

• refers to how fast an object is moving in terms of how far it moved in a given amount of time

Velocity

• the measure of speed in a given direction

• distinguishes direction

• it is important to know the magnitude

  • magnitude: distance or quantity

• formula: v = 🔼d/🔼t

  • v: velocity

  • 🔼: change in

  • d: displacement

  • t: time