velocity

• What should you be able to describe by the end of the video?

  The meaning of the word velocity
• Why is velocity considered a vector quantity?

  Because it includes both magnitude and direction
• What does motion in a circle involve regarding speed and velocity?

  Constant speed but changing velocity
• How do we calculate speed?

  Speed equals distance traveled divided by time taken
• What does speed not provide information about?

  The direction of the journey
• What is the definition of velocity?

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

  Its speed
• If an object travels at 20 meters per second south, what does this represent?

  Its velocity
• How is velocity calculated?

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

  1. 25 meters per second south
• What happens to the velocity of an object moving in a circle at constant speed?

  Its velocity is constantly changing
• What does the direction of a car moving around a circular racetrack indicate?

  That the car's velocity is constantly changing
• What is a key fact about objects moving at constant speed in a circle?

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

  • Speed is a scalar quantity
  • Velocity is a vector quantity
  • Velocity includes direction, speed does not
• What are the implications of an object moving in a circle at constant speed?

  • Constant speed
  • Changing direction
  • Constantly changing velocity
• What is the formula for calculating velocity?

  • Velocity = Distance / Time
  • Include direction in the answer