A motorcycle begins driving from at rest position. It accelerates at 8 km/hr2 for 20 seconds, then travels at a steady speed for another 20 seconds, all in the same direction. How much distance has it covered since it started driving?
s=at22+at⋅t=1.5at2=18.5 mm.s=\frac{at^2}2+at\cdot t=1.5at^2=18.5~mm.s=2at2+at⋅t=1.5at2=18.5 mm.
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