1. **Problem Statement:** We need to find the final speed of a sprinter at the end of the acceleration phase, given the acceleration and time or distance (not explicitly stated here, so we assume acceleration and time are known). 2. **Formula Used:** The final speed $v$ after acceleration is given by the formula: $$v = u + at$$ where: - $u$ is the initial speed (usually 0 for a sprinter starting from rest), - $a$ is the acceleration, - $t$ is the time of acceleration. 3. **Important Rules:** - If the sprinter starts from rest, $u=0$. - Ensure units are consistent (e.g., acceleration in $m/s^2$, time in seconds). - The final speed will be in $m/s$. 4. **Intermediate Work:** - Substitute the known values of $u$, $a$, and $t$ into the formula. - Calculate $v$. 5. **Answer:** - Round the final speed to 2 significant figures as requested. Since the exact values of acceleration and time are not provided in the question, please substitute your known values into the formula: $$v = 0 + a \times t = at$$ and then round to 2 significant figures. If you provide the values of $a$ and $t$, I can calculate the exact final speed for you.