Question

Train is travelling at a speed of 90 km per hour .Brakes are applied so as to produce a uniform retardation of 0.5 m per second .How far will the train go before it is brought to rest

Answer 1

Hello ,

here is your answer,

____________________


Initial velocity, u = 90 km/h = 90(5/18) m/s = 25 m/s

Acceleration, a = -0.5 m/s2

Using,

v2 = u2 + 2as

=> 0 = 252 – 2(0.5)s

=> s = 625 m

The train travels 625 m before coming to rest.


________________

Hope it helps u !!!

# Nikky

Answer 2

use the formula of motion
V²-U²=2aS
0²-25²=2×(-0.5)×S
625=S
just convert speed in meter per sec