A person starts to run at 12 m/s and then comes to a rest in 3s.
What is their velocity at 1 second

Velocity at 1 second = 8 m/s

Linear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration  

• An equation of uniformly accelerated motion  

V = vo + at  

Vt² = vo² + 2a (x-xo)  

x = distance on t  

vo / vi = initial speed  

vt / vf = speed on t / final speed  

a = acceleration  

A person starts to run at 12 m/s and then comes to rest in  3s.

At rest vf=0

vi=12 m/s

t = 3 s

0.11 m/s and 0.28 m/s should be correct

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.