Question

9, Zach is riding his bike at 25 m/s. He speeds up at a rate of 3 m/s². How fast will he goingafter 3 seconds?

Answer 1

We have:

vi = initial velocity = 25 m/s

a = acceleration = 3 m/s^2

t =time = 3 s

vf = final velocity = ?

Apply:

`a=((vf-vi))/(t)`

Isolate vf

`vf=at+vi`

Replacing:

`vf=3\text{ }m/s^(^2)(3s)+25m/s`
`vf=34\text{ m/s}`

Answer: 34 m/s