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Pure Rotation about an Axis

4. A disc of ...

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4. A disc of radius R rotates fro rest about a vertical axis with a constant angular acce. Such that coin placed at the periphery of the disc moves with tangential acc a. If the coefficient of static friction is $ fi d the distance travelled and the time taken before sliding?

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Q. A disc of radius R rotates from rest about a vertical axis with a constant angular acceleration such that a coin placed at the periphery of the disc moves with a tangential acceleration a as shown in Fig. If the coefficient of static friction between the coin and disc is

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