Speed

• What is the difference between distance and displacement?

  Distance is a scalar quantity that measures how far an object moves, while displacement is a vector quantity that measures the straight line distance and direction from the start point to the finish point.
• Why is distance considered a scalar quantity?

  Because it only tells us how far an object moves without indicating direction.
• What does displacement include that distance does not?

  Displacement includes direction along with magnitude.
• What is the definition of speed?

  Speed is the distance traveled by an object in a given time.
• Why is speed considered a scalar quantity?

  Because it only measures how fast an object is moving without indicating direction.
• What is the equation for calculating speed?

  Speed = distance traveled / time taken.
• How would you calculate the speed of a car that traveled 260 meters in 20 seconds?

  The speed is 13 meters per second.
• What are typical speeds for various activities?

  • Normal walking speed: 1.5 meters per second
  • Running speed: 3 meters per second
  • Cycling speed: 6 meters per second
  • Car on a main road: 13 meters per second
  • Fast train in the UK: 50 meters per second
  • Cruising aeroplane: 250 meters per second
  • Speed of sound in air: 330 meters per second
• How does terrain affect speed?

  Speed can vary based on the terrain, with flat ground allowing for faster movement than uphill.
• Why is the speed of a moving object rarely constant?

  Because factors like acceleration and deceleration affect the speed during movement.
• How do you calculate the distance traveled by an object moving at a constant speed?

  Distance (in meters) = Speed (in meters per second) × Time (in seconds)
• If a car is moving at a constant speed of 12 meters per second for 8 seconds, what is the distance traveled?

  The distance traveled is 96 meters.