Question Detail
Question
In Example 3, what was the minimum stopping distance for the car?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Using the work-energy theorem, -f_k Δx = 0 - ½mv₀². Solving for Δx gives Δx = (½mv₀²) / f_k = (0.5 × 1000 kg × (35 m/s)²) / (8000 N) = 76.6 m.
Hint
Set the initial kinetic energy equal to the work done by friction.