Help with this Kinematics question
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Help with this Kinematics question

[From: ] [author: ] [Date: 13-01-23] [Hit: ]
0 m/s in 4.5 s, then continues at this constant speed for another 4.5 s. What is the total distance traveled by the bike?-a = (vf - vi) / t===>a = 1.......
A bike first accelerates from 0.0 m/s to 5.0 m/s in 4.5 s, then continues at this constant speed for another 4.5 s. What is the total distance traveled by the bike?

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a = (vf - vi) / t ===> a = 1.11 m/s^s (not needed... but good to know)

average velocity, Vavg:

Vavg = .5 (Vf - Vi) = 2.5 m/s

Displacement during acceleration, S:

S = Vavg * t = 2.5 * 4.5 = 11.25 meters

Displacement after acceleration, S:
S = 5 * 4.5 = 22.5 meter

Total S = 33.75 meters

This is about as easy as kinematics gets, so I'd suggest you study/try a bit harder if you plan on making the grade.

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Vavg = .5(Vf + Vi), but since Vi =0 it didn't change the outcome.
Sorry I missed that minus sign.

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