Physics

Problem

Body A starts from rest at a point and moves with a constant acceleration of

2\,\text{m}\,\text{s}^{-2}

along a straight road. Five seconds later, Body B starts from the same point with a constant acceleration of

4\,\text{m}\,\text{s}^{-2}

along the same direction. How long after B starts will it catch up with A? a)

7.1\,\text{s}

10\,\text{s}

12\,\text{s}

5\,\text{s}