Problem 4: Determine the breaking efficiency (fill in the blanks)

A driver is traveling at 80 mi/h down a 3% grade on good, wet pavement. An accident investigation

team noted that breaking 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, what was the breaking

efficiency of the car? Round all answers to two decimal places, unless otherwise specified. Pay close

attention to the units.

frl=

nb=

(round to three decimals)

- 10 points