Question

Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant (and quite modest) acceleration. A train travels through a congested part of town at 6.0 m/s m / s . Once free of this area, it speeds up to 14 m/s m / s in 8.0 s s . At the edge of town, the driver again accelerates, with the same acceleration, for another 16 s s to reach a higher cruising speed. What is the final speed? Express your answer to two significant figures and include the appropriate units.

Answer 1

30 m/s

Step-by-step explanation:

We can equation of motion to solve this question.

`v = u + at \\ 14 = 6 + a(8.0) \\ a = 1m {s}^( - 2) \\ \\ v = u + at \\ v = 14 + (1)(16) \\ v = 30m {s}^( - 1)`