Solve the following :


A car starts from rest on a half kilometre long bridge. The co-efficient of friction between the tyre and the road is $1.0$. Show that one cannot drive through the bridge is less than $10 \mathrm{~s}$.


The maximum acceleration for car is given by,

$a=\mu g=1 \times 10=10 \mathrm{~m} / \mathrm{s}^{2}$


$s=500 \mathrm{~m}$

.$s=u t+\frac{1}{2} a t^{2}$

$t=10 \mathrm{sec}$


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