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Answer 1 · 2017-01-04T07:37:26

The distance #=800m#

We use the equation

#v^2=u^2+2as#

The initial velocity is #u=80ms^-1#

The final velocity is #v=0# (the racecar stopped)

The acceleration is #a=-4ms^-2#

The distance is #s=-u^2/(2a)=-80^2/(2*(-4))#

#=80*80/8=800 m#