what is the value of his average velocity ? (a) -1.8 m/s (b) -0.9 m/s (c) 0.0 m/

Question

what is the value of his average velocity ?

(a) -1.8 m/s (b) -0.9 m/s (c) 0.0 m/s (d) 0.9 m/s (e) 1.8 m/s

what is the value of his average speed ?

(a) -1.8 m/s (b) -0.9 m/s (c) 0.0 m/s (d) 0.9 m/s (e) 1.8 m/s

What is his acceleration from t = 1.0 s to t = 2.0 s?
. (a) -1.2 m/s2 (b) -0.6 m/s2 (c) 0.0 m/s2 (d) 0.6 m/s2 (e) 1.2 m/s2

In this part of the assignment, consider a unicyclist riding along a sidewalk. When he co0mes to a bump he decides to back up immediately and retrace his motion backward. He completes this maneuver in 3 seconds. His position and velocity at half-second intervals are given by the data shown in the following table. Note that SI units are used for all quantities. Also note that he is initially moving in the -x direction.

Explanation / Answer

verage velocity = displacement / time tken
= 1.35 - 1.35 / 3 = 0

2) average speed = distance / time tken
= 2 x 1.35 / 3 =0.9 m/s

3) a = vf - vi / t
= 0.6 -(-1.8) / 2
= 1.2 m/s2

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