p02_032

Fundamentals of Physics,Vol 1 (Chapters 1 - 20)

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Unformatted text preview: 32. From the figure, we see that x0 = -2.0 m. From Table 2-1, we can apply x - x0 = v0 t + 1 at2 with 2 t = 1.0 s, and then again with t = 2.0 s. This yields two equations for the two unknowns, v0 and a. SI units are understood. 0.0 - (-2.0) = 6.0 - (-2.0) = 1 a(1.0)2 2 1 v0 (2.0) + a(2.0)2 . 2 v0 (1.0) + Solving these simultaneous equations yields the results v0 = 0.0 and a = 4.0 m/s2 . The fact that the answer is positive tells us that the acceleration vector points in the +x direction. ...
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