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2.9 A ball moves in a straight line (the r-axis). The Figure E2.9 graph in Fig. E2.9 shows this v, (m/s) balls velocity as a function of time. (a) What are the balls 3.0 average speed and average velocity during the first 3.0 s? (b) Suppose that the ball moved 1.0 in such a way that the graph seg- ment after 2.0 s was-3.0 m/s ol 1.0 instead of +3.0 m/s. Find the 2.0 t(s) 2.0 3.0 i balls average speed and average velocity in this case.
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Average speed and velocity from speed vs time graph

2-3 rm 3 3Vavs 2-333ms y rm do s 3

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