If a speeding train hits the brake and it takes the train 39 seconds to go from 54.8 m/s to 12 m/s, what is the train acceleration?
1 Answer
Jun 6, 2018
I tried this:
Explanation:
We can use the relationship from Kinematics:
that tells us that the final velocity will depends upon the initial one and the acceleration operating during a certain time.
With your data we get:
rearranging:
the negative sign tells us that this acceleration (or de-celeration) will reduce our initial velocity in time.