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If the mass is 0.274 m from the wall and the angle between the string and the plank is 32.1°, (a) What is the force of...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eA 0.300 kg mass rests on a 0.395 m long, 0.764 kg, uniform wooden plank supported by a string as shown in the figure. 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