Question

A moving train is brought to rest within 20 seconds by applying brakes. Find the initial velocity, if the retardation due to brakes is 2m/s .​

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Secondary SchoolPhysics 15 points

A moving train is brought to rest within 20 second by applying brakes. Find the initial velocity if the retardation due to brakes is 2m/sec2

Ask for details Follow Report by Tausifkhan7214 26.05.2018

Answers

Hello friend ..!!

• According to the question, we should calculate the initial velocity

• Given :

t = 20 sec

V = 0 m/s

a = -2 m/s^2

therefore, U = ???

we know that

V = U + at

implies,

0 = U - 2 ( 20)

therfore,

U = 40 m/s

the initial velocity is 40 m/s

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