Question

a train moving with avelocity of 25 km/h brought to rest by applying brakes in 5s .calculate it's retardation
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Answer 1

$u = 25 \: kmh {}^{ - 1} = 6.94 \: m$

$v = 0 \\ t = 5 \: s$

Using Formula,

$\large{a = \frac{v - u}{t}}$

$\large{a = \frac{0 - 6.94}{5}}$

$\large{a = \frac{ - 6.94}{5}}$

$\huge\red{\boxed{\pink{a = 1.38 \: ms {}^{ - 2}}}}$

$</p><p>\large\purple{Retardation \: Is \: 1.38 \: ms {}^{ - 2}}$

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