Suppose a runner completes one lap around a 400-m track in a time of 50 s. Calculate the average velocity of the runner.
Express your answer in meters per second to the nearest integer.
zero
distance = 400
displacement = 0
(came back to the same spot)
To calculate the average velocity of the runner, we need to divide the total distance covered by the runner by the time taken. The distance covered by the runner is one lap around a 400-m track.
Average velocity (v) = total distance / time taken
In this case, the total distance covered is 400 meters (as the runner completes one lap around a 400-m track), and the time taken is 50 seconds.
Average velocity (v) = 400 meters / 50 seconds
Calculating this, we get:
Average velocity (v) = 8 meters per second
Therefore, the average velocity of the runner is 8 meters per second (to the nearest integer).
and if you are Rachel, that is a very different question from the earlier one.
speed = distance/time
velocity = displacement /time
for speed you need a speedometer
for velocity you need a speedometer and a compass