A particle moves on a circular path of radius 'r'. It completes one revolution in 40s. Calculate distances displacement in 2 min 20 s.

Explanation

To solve the problem, we need to calculate the distance traveled and the displacement of a particle moving along a circular path after a given time. Let's break it down step by step.

### Step 1: Convert the time from minutes and seconds to seconds
The total time given is 2 minutes and 20 seconds. We need to convert this into seconds:
- 2 minutes = 2 × 60 seconds = 120 seconds
- Therefore, total time \( t = 120 + 20 = 140 \) seconds.

**Hint:** Always convert time into a single unit (seconds) for easier calculations.
...