Ask Question
22 May, 18:22

Q2. In a 4x100 m

relay race, total track length is 200m and time taken by one particular group i s 50.2 s. What is

the average speed and average velocity of that group?

+3
Answers (1)
  1. 22 May, 18:45
    0
    A " 4 x 100 m " race means that four runners each run 100 meters, for

    a total of 400 meters ... very close to a quarter mile.

    On a 200-meter track, each runner does halfway around the track, and

    the whole team of four runners does twice around the track.

    This team did the whole thing in 50.2 seconds. The average time for each runner

    was 50.2/4 = 12.55 seconds.

    The average speed of each runner was (400 meters) / (50.2 seconds) = 7.968 m/s.

    Velocity is a speed and a direction. We have the speed, leaving only the puzzle of

    what to do about the 'average' direction.

    Here's a sneaky but easy way to dispense with the whole issue:

    Define the average velocity (vector) as (total displacement vector) / (total time).

    Since the fourth runner finished in exactly the same spot as the first runner

    began, the total displacement is zero, and therefore so is the average velocity.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Q2. In a 4x100 m relay race, total track length is 200m and time taken by one particular group i s 50.2 s. What is the average speed and ...” in 📗 Physics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers