Express the movement of the spot on the disk

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Reference no: EM131529304

Question: In the rotating disk and strobe demo, we observed that different flashing rates of the strobe light would make the spot on the disk stand still.

(a) Assume that the disk is rotating in the counter-clockwise direction at a constant speed of 720 rpm. Express the movement of the spot on the disk as a rotating complex phasor.

(b) If the strobe light can be flashed at a rate of n flashes per second where n is an integer greater than zero, determine all possible flashing rates such that the disk can be made to stand still. Note: The only possible flashing rates arc I per second. 2 per second. 3 per second, etc.

(c) If the flashing rate is 13 times per second, explain how the spot will move. and write a complex phasor that gives the position of the spot at each flash.

Reference no: EM131529304

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