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A car starts from rest and travels east with an acceleration of 4x10^-3 m/s^2. Another car...

A car starts from rest and travels east with an acceleration of 4x10^-3 m/s^2. Another car travels toward west at a constant speed of 70kph. The two cars are 100-km apart. Find (a) the time it takes for the two cars to meet and (b) the time it takes for them to be 100-km apart for the second time.

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