A particle starts to move in a straight line from its rest. In the first second, it moves at an acceleration of a = 1 m / S & sup2; in the second second, it moves at an acceleration of a '= - 1, and in the third, it moves at an acceleration of a = 1 m / S & sup2 =What is the total displacement of this particle after 100 s of repeated acceleration in the fourth second?
First second acceleration s = 1 / 2at ^ 2 = 0.5m
At the end of the second second, the speed is 0, decelerating. From the reverse view, it is the uniform acceleration with the initial speed of 0, s = 1 / 2at ^ 2 = 0.5m
In the third second, the acceleration starts from 0, s = 0.5
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100s displacement S = 100 * 0.5 = 50m
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