She was going with 224.64 m/s
Explanation:
Sydney is accelerating at a rate of -2.7 m/s^2. She comes to a complete
stop after 83.2 seconds
1. The final speed is zero
2. The acceleration is -2.7 m/s²
3. The time of the complete stop is 83.2 seconds
We need to find the initial speed of Sydney
→ v = u + at
where v is the final speed, u is the initial speed, a is the acceleration
and t is the time
→ v = 0 m/s , a = -2.7 m/s² , t = 83.2 seconds
Substitute these values in the rule above
→ 0 = u + (-2.7)(83.2)
→ 0 = u - 224.64
- Add 224.64 to both sides
∴ u = 224.64 m/s
She was going with 224.64 m/s
Learn more:
You can learn more about speed in brainly.com/question/2512053
#LearnwithBrainly
