(Solved): Problem 2: Stopping Distance Emergency at Commonwealth Avenue ( 25 points) At 7:00 AM, a stalled veh ...

Problem 2: Stopping Distance Emergency at Commonwealth Avenue ( 25 points) At 7:00 AM, a stalled vehicle blocks both lanes of a \( \mathbf{4 \%} \) downgrade segment of Commonwealth Avenue. A driver traveling at \( \mathbf{9 0 ~ k m} / \mathbf{h} \) suddenly sees the obstacle and brakes immediately. Joey is assigned to analyze the adequacy of the Stopping Sight Distance (SSD) under the following conditions: - Reaction time \( =2.7 \) seconds - Coefficient of friction = \( \mathbf{0 . 2 9} \) (due to light rain) Later, a second case is reported involving a driver at \( \mathbf{9 5} \mathbf{~ k m} / \mathbf{h} \) on the same section. 4. Calculate the reaction distance for a vehicle moving at \( 90 \mathrm{~km} / \mathrm{h} \). ( 5 pts) 5. Determine the braking distance under the given conditions. (10 pts) 6. Recalculate the SSD for the \( 95 \mathrm{~km} / \mathrm{h} \) case. ( 10 pts )