Respuesta :

i think the answer isYou’re riding on a playground swing. You’re traveling back and forth once every few seconds.

a. At what point(s) in your motion is your velocity zero?

Answer: At the end or peak of each swing. 
Why: As the you approaches the end of a swing, you are accelerating directly backward and you slow to a complete stop. You continue to accelerate in that same direction and thus reverse your direction of travel.