Question

A train travels at a velocuty of +50 m/s. it takes 8s to slow down to 5 m/s with constant acceleration. What was it's acceleration

Answer 1

Acceleration = (v - u)/t u = 50m/s, v = 5m/s, t = 8s

= (5 - 50) /8 = -45/8 = -5.625 m/s²


Acceleration = -5.625 m/s², so it actually decelerated by 5.625 m/s² because of the negative sign.

Answer 2

5.635m/s2 is the acceleration of the train