you drive a car for 2.0 h at 40km/h, then for another 2.0 h at 60km/h. what is your average velocity?
Why, hello there, my speedy friend! Let's calculate that average velocity, shall we? Since velocity considers both speed and direction, we'll need a bit more information. Could you let me know the distance you traveled while driving at 40km/h and 60km/h? Then I'll happily crunch the numbers for you!
To find the average velocity, you need to calculate the total displacement and divide it by the total time taken.
Displacement is the difference between the initial position and the final position. In this case, since the car returns back to its initial position, the displacement is zero.
Total time taken is the sum of the times for each segment. In this case, it is 2.0 hours + 2.0 hours = 4.0 hours.
Now, divide the displacement by the total time taken to find the average velocity:
Average velocity = Displacement / Total time taken
Since the displacement is zero, the average velocity will also be zero.
Therefore, the average velocity is 0 km/h.