Speed/Velocity & Distance/Displacement

• What are the two types of quantities discussed in the video?

  Scalar and vector
• What is a scalar quantity?

  A quantity with only magnitude
• Why is speed considered a scalar quantity?

  It only conveys magnitude
• What makes velocity a vector quantity?

  It has both magnitude and direction
• Why is it important to distinguish between speed and velocity in exams?

  They are commonly confused
• What type of quantity is distance?

  Scalar
• What is displacement?

  A vector quantity with direction
• How do you calculate the speed of an object?

  • Speed = Distance / Time
  • Example: 550 m / 10 s = 55 m/s
• If a train crosses a 550 m bridge in 10 seconds, what is its speed?

  55 m/s
• How does velocity differ from speed when calculating for a train?

  Velocity includes direction
• What does the symbol 's' represent in the speed equation?

  Speed
• What does the symbol 'd' represent in the speed equation?

  Distance
• What does 't' represent in both speed and velocity equations?

  Time
• Why might people use the velocity equation without direction?

  To represent negative velocity
• What is average speed?

  Total distance divided by total time
• What is the average walking speed of a person?

  1.5 m/s
• What is the average running speed of a person?

  3 m/s
• What is the average cycling speed of a person?

  6 m/s
• What is the speed of a car on the main road?

  25 m/s
• What is the speed of a fast train?

  55 m/s
• What is the speed of planes?

  Exceeds 250 m/s
• What is the speed of sound waves 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 and atmospheric pressure
• What can wind speed vary from on a still day?

  Almost zero m/s
• What can wind speed exceed on a windy day?

  Faster than a speeding train
• What are the key differences between speed and velocity?

  • Speed: Scalar quantity, only magnitude
  • Velocity: Vector quantity, includes direction
• What are the key differences between distance and displacement?

  • Distance: Scalar quantity, only magnitude
  • Displacement: Vector quantity, includes direction