Question

The driver of a car with a total of 1800 kg mass is traveling at 23 m/s when he slams on the brakes, locking the wheels on the dry pavement. The coefficient of kinetic friction between rubber and dry concrete is typically 0.7. Use the work–energy principle to calculate how far the car will travel before stopping.
123.4 m
378 m
1.68 m
38.6

Answer 1

Answer: 38.6 m

Step-by-step explanation:

1/2(1800)23^2 - (.7)(1800)(9.8 m/s^2)

476,100/121,100 = 3.93 which closest answer was 38.6 and I got it right