Question

2. A driver is traveling at 90 mi/h down a 3% grade on good, wet pavement. An accident investigation team noted that braking skid marks started 410 ft before a parked car was hit at an estimated 45 mi/h. Ignoring air resistance, and using theoretical stopping distance,

a. what was the braking efficiency of the car?

b. If the car’s antilock braking system was effective (no sliding wheels on the pavement), what would the crash speed be?

Answer 1