Physics

Problem

a. (i) Two trains A and B are

2.5\,\text{km}

apart on the same straight track and move towards each other. Train A has speed

15\,\text{m s}^{-1}

and acceleration

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

, while train B has speed

20\,\text{m s}^{-1}

and deceleration

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

. Calculate the time before they meet. b. (ii) Determine the speed of each train at the instant they meet.