1.

A car moving with a speed of `40 km//h` can be stopped by applying the brakes after at least 2 m. If the same car is moving with a speed of `80 km//h`, what is the minimum stopping distance?A. `8 m`B. `2 m`C. `4 m`D. `6 m`

Answer» Correct Answer - A
`v^(2)=u^(2)-2as`
`0=(40)^(2)-2axx2 …(i)`
`0=(80)^(2)-2axxd …(ii)`
`d=8 m`


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