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mass Example 7 15 A cord of negligible mass is wound round the rim of...

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mass Example 7 15 A cord of negligible mass is wound round the rim of a fly wheel of 20 kg and radius 20 cm A steady pull of 25 N is applied on the cord as shown in Fig 7 35 The flywheel is mounted on a horizontal axle with frictionless bearings a Compute the angular acceleration of the wheel b Find the work done by the pull when 2m of the cord is unwound c Find also the kinetic energy of the wheel at this point Assume that the wheel starts from rest d Compare answers to parts b and c

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