Speeds of two identical cars are $u$ and $4 u$ at the specific instant. The ratio of the respective…
Speeds of two identical cars are $u$ and $4 u$ at the specific instant. The ratio of the respective distances in which the two cars are stopped from that instant is
1 : 1
1 : 4
1 : 8
1 : 16
Solution
Use $u^2=2$ as. a is same for both cases
$
\mathrm{s}_1=\mathrm{u}^2 / 2 \mathrm{a} ; \mathrm{s}_2=16 \mathrm{u}^2 / 2 \mathrm{a}=16 \mathrm{~s}_1 \Rightarrow \mathrm{s}_1: \mathrm{s}_2=1: 16
$