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OSCILLATIONS - NCERT
are sections of a parabola given by the Newton’s equation of motion (see section 3.6), 1 2 2 h =ut + gt for downward motion, and 1 2 2 h =ut – gt for upward motion, with different values of u in each case. These are examples of periodic motion. Thus, a motion that repeats itself at regular intervals of time is called periodic motion.
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