Speed, Velocity, Distance, Displacement

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

  Scalar and vector
• What is a scalar quantity?

  It only has magnitude
• Why is speed considered a scalar quantity?

  Because it only conveys magnitude
• What makes velocity a vector quantity?

  It has both magnitude and direction
• What is distance classified as?

  Scalar quantity
• How is displacement different from distance?

  Displacement has direction
• How do you calculate the speed of an object?

  • Speed = Distance / Time
  • Example: 550 m / 10 s = 55 m/s
• How do you calculate velocity using displacement?

  Velocity = Displacement / Time
• What does the symbol 's' represent in the speed equation?

  Speed
• What does the symbol 's' represent in the velocity equation?

  Displacement
• What does 'd' stand for in the speed equation?

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

  Time
• What is the benefit of using the velocity equation?

  It allows for 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 average 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?

  Exceed 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, pressure, and structures
• 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 is the natural movement of air called?

  Wind
• What is the length of the bridge the train crosses?

  550 meters
• How long does it take the train to cross the bridge?

  10 seconds
• What happens to the speed of objects during their journey?

  It can vary
• What do you need to calculate average speed or velocity?

  Total distance or displacement and total time
• What is the significance of the average speed or velocity value calculated?

  It represents the overall speed during the journey
• What is the average speed of sound in air?

  330 m/s
• What is the relationship between speed and distance in the context of the video?

  Speed is calculated from distance and time
• How does temperature affect wind speed?

  It can influence the speed of air movement
• What is the effect of atmospheric pressure on wind speed?

  It can change the speed of air movement
• How do structures like buildings affect wind speed?

  They can alter the natural movement of air