Kinematics

• What is a frame of reference?

  A viewpoint of an imaginary observer
• How is distance defined in physics?

  Distance is the length between two points
• What is the difference between distance and displacement?

  Displacement is the distance between an object's initial and final point
• What is a scalar quantity?


  A quantity with only a magnitude (numerical value)
• What defines a vector?

  A vector has both magnitude and direction
• What is velocity in physics?

  Velocity is the rate of change of displacement
• How is acceleration defined?


  Acceleration is the rate of change of velocity
• What does uniformly accelerated motion imply?

  Uniformly accelerated is when velocity increases at a constant rate
• What does "constant" mean in a physical context?

  Constant is when something happens consistently
• What does quantitative refer to in motion?

  Quantitative is speed gained, acceleration, and time
• How does displacement compare to distance?

  Displacement is always less than or equal to distance
• What does displacement refer to?


  How far out of place an object is
• How is displacement defined in terms of position?


  It is the object's overall change in position
• What does distance refer to?


  How much ground an object has covered during its motion
• How do distance and displacement differ?


  They have distinctly different meanings despite seeming similar
• What are vector measurements fully described by?


  Both a numerical size and a direction
• Give an example of a vector measurement.


  100 meters East
• What type of quantity is displacement?


  A vector quantity
• How are scalar measurements described?


  By numerical size only
• What type of quantity is distance?


  A scalar quantity
• What is the difference between true bearing and angle description?

  • True bearing: Angle clockwise from North
  • Angle can be described in three ways:
  • North West
  • N 45° W
  • 315° T
• In the worked example, what is the first step in analyzing the student's motion?

  Determine the distance travelled
• What is the second step in the worked example regarding the student's motion?


  Calculate the displacement
• What is the third step in the worked example regarding the student's motion?


  Find the student's displacement at point C
• How is velocity defined?


  As the rate at which displacement changes
• What is the unit of velocity?


  Meters per second (m/s)
• Why is velocity considered a vector quantity?


  It must include a direction
• How is speed defined?


  As the rate at which an object moves over a distance
• What is the unit of speed?


  Meters per second (m/s)
• How is speed classified?

  As a scalar quantity
• What is the triangle formula for velocity?


  Velocity = Distance / Time
• How do you convert units of speed from m/s to km/h?


  Multiply by 3.6
• If Tom ran 400 m in 58 s, how do you calculate his speed?


  Speed = Distance / Time
• How do you convert 2 km driven in 120 s to m/s?

  Speed = 2 km / 120 s = 0.01667 km/s = 16.67 m/s
• If Jaimie was riding her bike at 8 m/s for 5 mins, how far did she travel?


  Distance = Speed × Time = 8 m/s × 300 s = 2400 m
• What does 'v' represent in acceleration equations?


  Final velocity
• What does 'u' represent in acceleration equations?


  Initial velocity
• What is the unit of acceleration?


  Meters per second squared (m/s²)
• Why is acceleration considered a vector?


  It must include a direction
• What is deceleration?


  Acceleration in the opposite direction to velocity