speed and velocity

• Why is velocity considered a vector quantity?

  It includes both magnitude and direction
• What does speed tell us about an object's journey?

  The distance traveled in a given time
• How is speed calculated?

  Speed = distance traveled / time taken
• What type of quantity is speed?

  Scalar quantity
• How is velocity defined?

  Speed in a given direction
• If an object travels at 20 meters per second, what does this represent?

  Its speed
• What does stating an object travels at 20 meters per second south indicate?

  Its velocity
• How do we calculate velocity?

  Same way as speed, with direction
• What is the velocity of a person walking 50 meters south in 40 seconds?

  1.25 meters per second south
• What happens to velocity when an object moves in a circle at constant speed?

  Velocity is constantly changing
• Why does a car moving around a circular racetrack have changing velocity?

  Its direction is constantly changing
• What is a key fact about objects moving at constant speed in a circle?

  Velocity is constantly changing
• What is the relationship between speed and velocity?

  • Speed is a scalar quantity
  • Velocity is a vector quantity
  • Velocity includes direction
• What are the implications of motion in a circle for velocity?

  • Constant speed
  • Changing direction
  • Changing velocity
• What is meant by speed?

  The distance traveled in a given time
• How do you calculate the speed of a moving object?

  Distance traveled divided by time taken
• What does distance tell us about an object's movement?

  How far an object moves without direction
• Why is distance considered a scalar quantity?

  It has magnitude but no direction
• What does displacement include that distance does not?

  The direction of the straight line
• Why is displacement classified as a vector quantity?

  It includes both magnitude and direction
• What is the formula for speed?

  Speed = distance / time
• What is the symbol for speed in physics?

  V
• What is the symbol for distance in physics?

  S
• If a car travels 260 meters in 20 seconds, what is its speed?

  13 meters per second
• What are typical speeds for various activities?

  • Normal walking speed: 1.5 m/s
  • Running speed: 3 m/s
  • Cycling speed: 6 m/s
  • Car on main road: 13 m/s
  • Fast train in the UK: 50 m/s
  • Cruising airplane: 250 m/s
  • Speed of sound in air: 330 m/s
• What factors can affect a person's speed?

  Age, fitness, terrain, and distance
• How does terrain affect speed?

  People move faster on flat ground
• Why do runners tend to run faster at the start of a long distance?

  They are less tired at the beginning
• What is the speed of sound in air on warmer days?

  It travels faster than on cooler days
• Why is the speed of a moving object rarely constant?

  It changes during different points of a journey
• How do you calculate the distance traveled by an object at constant speed?

  Distance = speed × time
• If a car moves at 12 meters per second for 8 seconds, what distance does it travel?

  96 meters
• What should you do to prepare for questions on speed and distance?

  • Review the speed formula
  • Learn typical speeds for activities
  • Practice calculations for distance and speed