1.

A car moving with a speed of 50 km/h, can be stopped by brakes after at least 6 m. If the same car is moving at a speed of 100 km/h, the minimum stopping distance is :

Answer»

6 m
12 m
18 m
24 m

Solution :`"Stopping DISTANCE"=(K.E.)/("Force of distance")`
`S=(1/2mv^2)/(F)`
or`S prop v^2`
`:.(S_2)/(S_1)=(v_2^2)/(v_1^2)`
`:.(S_2)/(6)=((100)^2)/((50)^2)=4`
`S_2=24 m`


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