Question

a train is approaching a station at a velocity of 25 m/s. the train brakes and within 5 seconds comes to a stop. acceleration = (final velocity - initial velocity)/time interval

Explanation:

Step1: Identify values

Initial velocity $u = 25$ m/s, final velocity $v=0$ m/s, time interval $t = 5$ s.

Step2: Apply acceleration formula

$a=\frac{v - u}{t}=\frac{0 - 25}{5}$

Step3: Calculate acceleration

$a=\frac{- 25}{5}=-5$ m/s²

Answer:

$-5$ m/s²