Question

a train accelerates from rest (0 m/s) at a rate of 3km/hr per second. What is the train's speed after 12 seconds?

Answer 1

use the formula,v=u+ft

Answer 2

here,v=the speed after 12 seconds..t=12, u=0 and f=3000/3600 m/second

Answer 3

Here, initial speed is 0 so : u = 0..

So, using v = u + at

a = 3*(5/18) = 5/6

and t = 12 :

v = 0 + (5/6)*12

v = 5*2 = 10 m/s

Answer 4

\(\color{blue}{v = 10 \; m/s}\)