Question

A train moving at 40km/h applies brakes so that there is a constant 0.5m/s².find the time taken before the train stops. ​

Answer 1

t = 22.22 s

Explanation:

Given that,

The initial speed of the train, u = 40 km/h

Acceleration of the train, a = 0.5 m/s²

Finally, it stops, v = 0

We need to find the time taken by it to stop. using first equation of motion to find it such that,

`v=u+at\\\\t=(v-u)/(a)\\\\t=(0-40* (5)/(18))/(-0.5)\\\\t=22.22\ s`

So, it will take 22.22 seconds to stop.