A.) An object is moving along the x axis. At t = 5.6 s, the object is at x = +3.

Question

A.) An object is moving along the x axis. At t = 5.6 s, the object is at x = +3.0 m and has a velocity of +5.8 m/s. At t = 6.4 s, it is at x = +9.0 m and its velocity is -1.0 m/s. Find the average acceleration during the time interval 5.6 s ? t ? 6.4 s.

____m/s^2

B.) A bus accelerates at 1.6 m/s2 from rest for 13 s. It then travels at constant speed for 22 s, after which it slows to a stop with an acceleration of magnitude 1.3 m/s2.

-What is the total distance that the bus travels?
___km

-What was its average velocity?

___m/s

Explanation / Answer

A.

Note that

a = (vf - vi) / t

Thus, as vf = -1.0 m/s, vi = 5.8 m/s, t = 6.4 - 5.8 s = 0.6 s,

a = 11.3 m/s^2   [ANSWER]

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