Question

. A train is approaching a station at a velocity of 40 m/s. The train brakes and

within 10 seconds comes to a stop. What is the train's acceleration?

Answer 1

-4

Step-by-step explanation:

formula for acceleration is

`a = (vf - vi)/(t)`

vf as in final velocity

vi as in initial velocity

t as in time

the initial velocity is 0 m/s and the final velocity is 0 m/s because the train comes to a stop. the time is 10 s.

the answer is negative because the train is slowing down