A bird sitting on a tree top at a height of 5 m from the ground, picks up sticks lying on the ground to build a nest on the tree top. It starts picking up the sticks at `7:00` a.m. and ends up at `7:10` a.m. During this interval it makes 5 trips up and down. Find the average speed and average velocity of the bird.

Explanation

Total distance travelled `=5xx2xx5=50m`.
Time taken = 7:00 to 7:10 am = 10 minutes.
`=10xx60s=600s.`
Average speed `=("Total distance")/("Total time")`
`=(50)/(600)=(1)/(2)ms^(-1)`.
Total displacement = zero
`:.` Average velocity = zero