A particle moves along a circle of radius `R. It starts from (A) and moves in antilockwise direction. Calculate the distance travelled by particle (a)one complete revolution. Also calcuate the magnituede of displacement in each case. Fig. 2 (a) .28.

Explanation

Let's solve the problem step by step:

### (a) Distance Travelled and Displacement for One Complete Revolution

1. **Distance Travelled:**
- When a particle completes one full revolution around a circle of radius \( R \), it travels the circumference of the circle.
- The circumference \( C \) of a circle is given by:
\[
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