Answer:
Average velocity= 1 m/s
Explanation:
Step one:
given data
total distance covered = 10 meters backwards+ 20 more meters backwards
toatal distance= 10+20= 30 meters
time taken = 20 seconds
Required
The average velocity
Step two:
the expression for the average velocity is
Average velocity= total distance/total time taken
Average velocity= 30/30
Average velocity= 1 m/s
