Question

A moving train is bought to rest within 20 sec by applying brakes Find the initial velocity if the retardation due to breaks 2m/s​

Answer 1

Answer:

10seconds

Step-by-step explanation:

20÷2=10 theregore

Answer 2

Answer:

The answer is 40m/s

Step-by-step explanation:

Data- acceleration=-2m/s^2 (retardation)

t=20s final velocity (v)=o, u=?

v=u+at

0=u+(-2)(20)

u=40m/s

Hope this helps