# Chapter 2 - Kinematics in One Dimension - Problems: 20

a) -0.6 $m/s^{2}$ b) +9.4 m/s

#### Work Step by Step

Let due north be the positive direction a) a = $\frac{v-u}{t}$ = $\frac{10.6 - 13.0}{4.0}$ = -0.6 $m/s^{2}$ The direction of the emu's acceleration is due south b) v = u + at = (10.6) + (-0.6)(2.0) = +9.4 m/s

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