Motion

    Cards (27)

    • What is the definition of distance between two points?
      How far they are apart
    • How does displacement differ from distance?
      Displacement specifies direction as well
    • What is speed defined as?
      The rate at which distance changes
    • What is the difference between speed and velocity?
      Velocity is displacement change rate
    • What is the formula for average speed?
      Average speed = total distance / total time
    • What is the formula for average velocity?
      Average velocity = total displacement / total time
    • What is Jo's final displacement after walking around the pitch?
      200 m to the right
    • What does the rate of change of speed measure?
      Final speed minus initial speed
    • What is the unit for rate of change of speed?
      m/s²
    • What does a constant rate of change of speed imply?
      Average speed can be calculated
    • What is the formula for average speed when acceleration is constant?
      Average speed = (initial speed + final speed) / 2
    • What happens to average velocity if starting and finishing positions are the same?
      Total displacement will be zero
    • What is acceleration defined as?
      Rate of change of velocity with time
    • What does a positive acceleration indicate?
      Velocity is increasing
    • What does a negative acceleration indicate?
      Velocity is decreasing or retardation
    • What is the method for investigating average speed on a ramp?
      1. Set up a ramp with height measured.
      2. Draw pencil lines 1.0m apart on the ramp.
      3. Allow a trolley to roll down and time its motion.
      4. Record results for different heights.
    • What is a scalar quantity?
      A quantity with magnitude but no direction
    • What is a vector quantity?
      A quantity with both magnitude and direction
    • Why is the sum of masses always additive but forces are not?
      Masses are scalar, forces are vector quantities
    • What do you need to interpret distance-time and velocity-time graphs?
      • Gradient of distance-time graph = speed
      • Gradient of speed-time graph = rate of change of speed
      • Area under speed-time graph = distance moved
      • Gradient of displacement-time graph = velocity
      • Gradient of velocity-time graph = acceleration
      • Area under velocity-time graph = displacement
    • How do you calculate distance from a speed-time graph?
      Area between graph and time axis
    • How do you calculate acceleration from a velocity-time graph?
      Gradient of the velocity-time graph
    • How do you find displacement from a velocity-time graph?
      Area between graph and time axis
    • What is the average speed of Jim during the first 15 seconds?
      4 m/s
    • What is Jim's average speed for the entire 25 seconds?
      2.4 m/s
    • What is the final displacement of the soldier after his march?
      Calculate based on his movements
    • What are the key concepts of motion graphs?
      • Gradient of distance-time graph = speed
      • Gradient of speed-time graph = acceleration
      • Area under speed-time graph = distance
      • Gradient of velocity-time graph = acceleration
      • Area under velocity-time graph = displacement