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A car moving with a velocity 20 m/s is came to rest by applying the brakes in 5sec. Calculate reterdation and the distance travel by the car?



t=5 sec
we know :a= \frac{v-u}{t}
a=  \frac{0-20}{5}
  =  \frac{-20}{5}
a = -4m/s²
0 0 0

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 initial velocity<u> as 20 m/s

 final velocity<v> as 0 m/s as car breaks and time<t> is 5 sec 

 acceleration<a>= (v - u)/t  ,
a= (0 - 20)/5,

a= -4 m/s(sq) here ' - ' sign shows .

And displacement<s>

s= (0 - 400)/(2*< - 4>) ,
s=50 m <ans.>
0 0 0
' - 'sign shows opposite acceleration
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