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In figure, what be the sign of the veloc...

In figure, what be the sign of the velocity of the point P', which is the projection of the velocity of the reference particle P.P is moving in a circle of radius R in anti-clockwise direction.

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As the particle on reference circle moves in anti-iclockwise direction. The projection will move from P' to O towards left.

Hence, in the position shown the velocity is directed from `P'toP''` i.e., from right to left, hence sign is negative.
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