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A small black ball of mass 100g and radius 2 cm hangs at restfrom a string of length 50 cm. A laser beam with an intensityI = 4 kW/m² and a cross-sectional area 0.01 cm² isfocused on the ball for 0.1 sec, causing the ball to swing. Assuming the ball is completely non-reflective, what is the amplitude of the resulting oscillation?

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