The s–t graph for a train has been experimentally determined. From the data, construct mdch12

The s–t graph for a train has been experimentally

determined. From the data, construct the v–t and a–t graphs

for the motion; 0 < t < 40 s. For 0 < t < 30 s, the curve is

s = (0.4t^2) m, and then it becomes straight for t t>30 s.

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The s–t graph for a train has been experimentally

determined. From the data, construct the v–t and a–t graphs

for the motion; 0 < t < 40 s. For 0 < t < 30 s, the curve is

s = (0.4t^2) m, and then it becomes straight for t t>30 s.