In the figure, what will be the sign of the velocity of the point , which is the projection of the velocity of the reference particle P. P is moving in a circle of radius R in the anti-clockwise direction.
Hint: The direction of velocity depends on the motion of the particle.
Step 1: Find the direction of velocity.
As the particle on the reference circle moves in the anti-clockwise direction. The projection will move from P' to O towards left.
Hence, in the position shown, the velocity is direction from P' P'' i.e., from right to left, hence sign is negative.
