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20 December, 00:28

What are the signs of the angular velocity ω and angular acceleration α of the pulley in case (a) ? by convention, clockwise rotations are negative and counterclockwise rotations are positive?

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  1. 20 December, 00:52
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    Everything which rotates in the direction of clock is taken as negative and opposite to clock is taken as positive. It is a sign convention.
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