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A rod of leng...

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A rod of length 1.0 m and mass 0.5 kg fixed atone end is initially hanging vertical. The otherend is now raised until it makes an angle 60^° with the vertical. The work required to be donefor this, is(a) 1.2 J(c) 2.4J(b) 1.8J(d) 3.0 J

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