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 `=2xx10xx5=100 m.`
Time taken = 7:10 - 7:00 a.m. = 10 minutes
`=10xx60s=600s`
Average speed =`("Total distance")/("Total time")`
`=(100)/(600)=(1)/(6) ms^(-1)`
`=0.166 m s^(-1)`
Total displacement = zero
`:.` Average velocity = zero