Question #30ae8

1 Answer
Narad T.
Nov 11, 2016

The distance is =625 m

Explanation:

Let's convert the kmh^(-1) in ms^(-1)

90kmh^(-1)=90*1000/3600=900/36=25 ms^(-1)

We use the equation,

v^2=u^2+2as
where v=final velocity (0)
u= initial velocity (25ms^(-1))
a= acceleration (-0.5ms^(-2))
s= distance =?

So, 0=25^2+(2*-0.5*s)

s=25^2=625 m

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