If we have a velocity of 20 m/s and our acceleration is -5 m/s, then after 2 seconds our velocity will be.... a) 15 m/s b) 40 m c) 10 m/s d) -10 m/s

Question

asked Apr 7, 2021 129k views

1 Answer

Vranvs · Answer 1 · 2021-04-12T18:01:46+0000

Answer:

v = 10 m/s

Step-by-step explanation:

We have,

Our initial velocity is 20 m/s

Our acceleration,
$a=-5\ m/s^2$

It is required to find the velocity after 2 seconds. It is a concept based on equation of kinematics. Using first equation:

v=u+at

Plugging all the known values

$v=20+(-5)(2)\\\\v=10\ m/s$

So, our final velocity is 10 m/s.