First, we need to convert the car's velocities from km/h to m/s.
For 20 km/h:
\(20 \frac{\text{km}}{\text{h}} \times \frac{1000 \text{m}}{1 \text{km}} \times \frac{1 \text{h}}{3600 \text{s}} = 5.56 \frac{\text{m}}{\text{s}}\)
For 40 km/h:
\(40
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