Chapter 1

At 12 Fps, - The film covers 7.5*360 degree rotation in 12 frames, Therefore the degree of turn per frame = 7.5*30 = 225(360>225>180) Hence the wheel appears to turn in anti-clockwise (backward) direction, At a speed covering (360-225) = 135 degree turn per frame. Hence a total turn of 135*12 degrees per second = 135*12/360 rot/sec ................
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