Question
In Fig. 14.9, what will be the sign of the velocity of the point, which is the projection of the velocity of the P′ reference particle P .P is moving in a circle of radius R in anticlockwise direction.
✓
Answer
P' is foot perpendicular of velocity vector of particle p at any time t.
Now particle moves from p to $p_1$ then its foot shifts from p' to Q i.e, towards negatives axis.
Hence the sign of $\theta$ motion of P' is negative.
Now particle moves from p to $p_1$ then its foot shifts from p' to Q i.e, towards negatives axis.
Hence the sign of $\theta$ motion of P' is negative.
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