p02_035

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

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35. The acceleration is constant and we may use the equations in Table 2-1. (a) Taking the first point as coordinate origin and time to be zero when the car is there, we apply Eq. 2-17 (with SI units understood): x = 1 2 ( v + v 0 ) t = 1 2 (15 + v 0 ) (6) . With x = 60 . 0 m (which takes the direction of motion as the + x direction) we solve for the initial velocity: v 0 = 5 . 00 m/s. (b) Substituting v = 15 m/s, v 0 = 5 m/s and t = 6 s into a = ( v v 0 ) /t (Eq. 2-11), we find a = 1 . 67 m/s 2 . (c) Substituting v = 0 in v 2 = v 2 0 + 2 ax and solving for x , we obtain
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