Motions

Cards (70)

  • What are the two types of quantities discussed?
    Scalar and vector
  • What is a scalar quantity?
    It has only magnitude
  • What is a vector quantity?
    It has both magnitude and direction
  • Is speed a scalar or vector quantity?
    Scalar quantity
  • Give an example of speed.
    A person running at 4 m/s
  • Is velocity a scalar or vector quantity?
    Vector quantity
  • Give an example of velocity.
    A person cycling 6 m/s east
  • Why is it common to confuse speed and velocity?
    Both are related to motion but differ in direction
  • What is distance considered as?
    Scalar quantity
  • What is displacement considered as?
    Vector quantity
  • What is the difference in units between speed and velocity?
    Velocity includes direction, speed does not
  • What does the letter 's' represent in the velocity equation?
    Displacement
  • What does the letter 's' represent in the speed equation?
    Speed
  • What does 'd' represent in the speed equation?
    Distance
  • What does 't' represent in both equations?
    Time
  • Why do people often use the velocity equation incorrectly?
    They may not have a direction
  • What is average speed?
    Total distance divided by total time
  • What is average velocity?
    Total displacement divided by total time
  • What are typical walking, running, and cycling speeds in m/s?
    • Walking: 1.5 m/s
    • Running: 3 m/s
    • Cycling: 6 m/s
  • What are typical speeds for vehicles in m/s?
    • Car: 25 m/s
    • Fast train: 55 m/s
    • Plane: >250 m/s
  • What is the speed of sound in air?
    330 m/s
  • How does the speed of sound change in different mediums?
    It varies depending on the medium
  • What factors can affect wind speed?
    Temperature, pressure, and structures
  • What can wind speed vary from?
    Almost 0 m/s to > train speed
  • What happens to the speed of objects during their journey?
    It can vary along the journey
  • What is the benefit of using velocity?
    You can represent backward motion
  • What is acceleration defined as?
    Rate of change in velocity
  • How is acceleration measured?
    In meters per second squared
  • What does the delta sign (Δ) represent?
    Change
  • How can change in velocity (Δv) be expressed?
    As v minus u
  • What is the formula for calculating acceleration?
    Acceleration = change in velocity / time
  • What does a negative acceleration indicate?
    Object is slowing down
  • What is uniform or constant acceleration?
    Acceleration remains the same over time
  • What additional variable is included in the second acceleration equation?
    Distance
  • When should you use the second acceleration equation?
    When given the unit of distance
  • What is the initial velocity (u) of an object that starts from stationary?
    Zero meters per second
  • How does the acceleration of the ball relate to its final velocity?
    Acceleration affects how fast it falls
  • What is the significance of the calculated height of 2.5 meters?
    It is the height from which the ball was dropped
  • What do distance-time graphs allow us to visualize?
    How far something has traveled over time
  • What does the gradient of the line on a distance-time graph represent?
    The speed of the object at that time