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Q. A wheel rotating about a fixed axis through its center has a constant angular acceleration of 4.0 rad/s^2. In cerain 4.0s interval the wheel turns through an angle of 80 rads. a.) what is the angular velocity of the wheel at the start of the 4.0s interval ? b.) Assuming that the wheel starts from rest, how long is it in motion at the start of the 4s interval?

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