$\vec{a} = \frac{\vec{v_f} - \vec{v_i}}{\Delta t}$ $\vec{a}$ = Final Velocity - Time Inter. (1) $\frac{60 \text{ km}}{\text{min}} = \text{ m/s}$ (2) $\frac{40 \text{ km}}{\text{h}} = \text{ m/s}$ (3) $\frac{100 \text{ mil}}{\text{min}} = \text{ m/s}$
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