Compute your average velocity in the following two cases: (a) you walk 56.8 m at a speed of 1.26 m/s and then run 56.8 m at a speed of 3.48 m/s along a straight track. (b) you walk for 1.00 min at a speed of 1.26 m/s and then run for 1.58 min at 3.48 m/s along a straight track.

The average velocity is defined as

Which means we need to find the total time and the total distance traveled.

Now, by given, we know that the person walked 56.8 meters as total, with an speed of 1.26 m/s. We can use this information to find the time that took to traveled all the way

The first part took 45.08 sec.

We repeat the process for the second part with

The second part took 16.32 seconds.

So the total distant and total time are

The average speed is

This time we have 1 minutes (which is 60 seconds) in the first part at a speed of 1.26m/s. So, the distance traveled is

The second part took 1.58 minutes, which are (1.58x60) seconds at 3.48 m/s

So, the average velocity is

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.