Linear motion

• What is linear motion?

  The movement of a body in a straight line
• What type of force creates linear motion?

  A direct force applied through the center of mass
• What is the definition of distance?

  The total length of the path covered
• What is the definition of displacement?

  The shortest straight-line route from start to finish
• What is the formula for calculating speed?

  Speed = Distance / Time
• What are the units for speed?

  Metres per second (m/s)
• What is the formula for calculating velocity?

  Velocity = Displacement / Time
• What are the units for velocity?

  Metres per second (m/s)
• If a sprinter runs 200m in 21.34s, what is their average speed?

  9.37 m/s
• If a sprinter runs 100m in 9.58s, what is their average velocity?

  10.44 m/s
• What is acceleration?

  The rate of change in velocity
• What is deceleration?

  Negative rate of change in velocity
• What is the formula for calculating acceleration?

  Acceleration = (Final velocity - Initial velocity) / Time
• What are the units for acceleration?

  Metres per second squared (m/s²)
• If a sprinter's velocity changes from 9 m/s to 5 m/s in 2 seconds, what is their rate of deceleration?

  -2 m/s²
• If a sprinter covers 20m in 2.89 seconds, what is their acceleration?

  2.39 m/s²
• What are the key linear motion descriptors?

  • Distance: Total path length covered
  • Displacement: Shortest straight-line route
  • Speed: Rate of change in distance
  • Velocity: Rate of change in displacement
  • Acceleration: Rate of change in velocity
  • Deceleration: Negative rate of change in velocity
• How do you calculate average speed and acceleration in sports?

  1. Average Speed = Distance / Time
  2. Average Acceleration = (Final velocity - Initial velocity) / Time
• What are the differences between distance and displacement?

  • Distance: Total path length
  • Displacement: Shortest straight-line distance
• What are the differences between speed and velocity?

  • Speed: Rate of change in distance
  • Velocity: Rate of change in displacement
• What are the differences between acceleration and deceleration?

  • Acceleration: Positive rate of change in velocity
  • Deceleration: Negative rate of change in velocity
• How do you define distance and displacement for a swimmer completing three lengths of a 50m pool?

  • Distance = 150 m
  • Displacement = 50 m
• What is linear motion?

  Movement in a straight or curved line
• What is the definition of distance?

  Total length of the path covered
• What is the formula for calculating distance?

  Speed x Time
• What unit is used for measuring distance?

  Metres
• What is displacement?

  Shortest straight-line route from start to finish
• What is the formula for calculating displacement?

  Velocity x Time
• What unit is used for measuring displacement?

  Metres
• What is speed?

  Rate of change in distance
• What is the formula for calculating speed?

  Distance / Time
• What unit is used for measuring speed?

  m/s
• What is velocity?

  Rate of change in displacement
• What is the formula for calculating velocity?

  Displacement / Time
• What unit is used for measuring velocity?

  m/s
• What is acceleration?

  Rate of change in velocity
• What is the formula for calculating acceleration?

  (Final Velocity – Initial Velocity) / Time
• What unit is used for measuring acceleration?

  m/s²
• What is deceleration?

  Negative rate of change in velocity
• What does a distance/time graph show?

  • Visual representation of distance travelled
  • Plotted against time taken
  • Indicates speed at any moment