To find the time interval, we can use the speed equation:
\[ t = \frac{d}{s} \]
where:
- \( d \) = distance = 0.2 m
- \( s \) = speed = 0.1 m/s
Plugging in the values:
\[ t = \frac{0.2 \text{ m}}{0.1 \text{ m/s}} = 2 \text{ s} \]
Therefore, the time interval is 2 s.