Acceleration: how long will it take a cyclist
witha forward acceleration of -.50 m/s2 to bring a bicycle with
aninitial farward velocity of 13.5 m/s to a complete stop?

It will take 27 seconds for a cyclist to stop completely.

Explanation:

Initial velocity of the cyclist= u = 13.5 m/s

Acceleration of the driver = a  =

Final velocity of the cyclist = v = 0

Duration of time in which 13.5 m/s velocity is changed to 0 = t = ?

Using first equation of motion:

v = u + at

It will take 27 seconds for a cyclist to stop completely.

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