Two motor cars starting off with a time gap of 2 minutes, travel in the same direction with the same acceleration. Time taken by the second car, since its departure, to complete (1/9)th of the distance covered by the first car is:
A
3 minutes
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B
1 minute
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C
2 minutes
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D
none of the above
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Solution
The correct option is B1 minute
If t is the time taken by a car to move a distance s, then,
Distance traveled by the first car: s1=12at2 Distance traveled by the second car: s2=12a(t−2)2