A Light-rail passenger trains that provide transportation within and between cit

Question

A 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 7.0 m/s. Once free of this area, it speeds up to 14 m/s in 8.0 s. At the edge of town, the driver again accelerates, with the same acceleration, for another 16 s to reach a higher cruising speed. What is the final speed? Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

from given data

a = 14-7 /8 = 7/8 m/sec^2

Vf = 14 + a (16)

Vf = 28m/sec

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