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A whel of M.I. = 1 kg-m^(2) is rotatin...

A whel of M.I. = `1 kg-m^(2)` is rotating at an angular speed of 40 rad/s. Due to friction on the axis, the wheel comes to rest in 10 minute. What is the angular momentum of the wheel in` kg m^(2)//s` two minutes before it comes to rest ?

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