Answer:
We know that velocity equals to difference in distance divided by difference in time.
1st period: velocity is increasing. Where v = (8-0)/(3-0) = 8/3 m/s.
2nd one: velocity decreases. Where
v=(5-8)/(4-3) = (-3) m/s.
3rd one: velocity is constant because no change in distance, so v=0.
4th one: velocity increases again. Where v=(10-5)/(8-6)= 5/2 m/s.
5th one: velocity is constant again, so v=0.
6th one: velocity decreases, where
v=(6-10)/(15-12)= (-4)/3 m/s.
