👤
Answered

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 :

We have:

vi = initial velocity = 25 m/s

a = acceleration = 3 m/s^2

t =time = 3 s

vf = final velocity = ?

Apply:

[tex]a=\frac{(vf-vi)}{t}[/tex]

Isolate vf

[tex]vf=at+vi[/tex]

Replacing:

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

Answer: 34 m/s

In Trainings: Other Questions