Question

If a train going 90 m/hr hits the brakes, and it takes the train 1 minute 25 seconds to stop, what is the train’s acceleration?

Answer 1

Explanation:

Given

u= 90m/hr = 1/40 m/s

v= 0m/s

t= 1min 25 sec = 85 sec

a= v-u/t

= 0- 1/40 ÷ 85 m/s2

= -2.12 m/s2