Time and motion studies address the issues of industrial production and efficiency, since they attempt to measure time on task, product quality, and worker safety
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the body is in accelerated motion.
by using the formula we will calculat time period of simple harmonic motion
For that period of time, d(t) (the distance) is not changing so the motion is zero velocity.
In common usage, motion refers to a change in position WITHOUT any reference to time. In that case the dimensions of motion are [L]. However, in physics and mathematics, motion is generally understood to be a change in position with respect to some period of time. In that case the dimensions are [L][T-1].
The expected answer - of either a position time graph or a speed time graph - is wrong. That is because these take account of motion in the line joining the origin to the moving body but not any motion in a transverse direction.