GCSE Physics (AQA)

346 videos | 23 hours

Average Speed

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Forces Forces and motion

Average Speed

5:09 Average Speed and Velocity
Spec 4.5.6.1.2
Previous Uniform Acceleration Equation Next Newton's First Law
  • Objects often have speeds that change constantly during a journey.
  • A car's speed can vary due to traffic, speed limits, and changing terrain.
  • Other objects, like runners, wind, and sound waves, also experience varying speeds for different reasons.
  • Average speed is used to describe how quickly an object completes a journey.
  • Average speed is calculated by dividing the total distance traveled by the total time taken.
  • The formula for average speed is V = S/T, where V is average speed, S is total distance, and T is total time.
  • Units for average speed are meters per second (m/s).
  • Example: Calculating the average speed of a marathon runner who completes a 42 km marathon in 2 hours.
  • Convert distance to meters (42,000 meters) and time to seconds (7,200 seconds).
  • Average speed = 42,000 meters / 7,200 seconds = 5.833 m/s.
  • Round to two significant figures: 5.8 m/s.

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.