- #1
cbrons
- 44
- 0
Homework Statement
1. A car moving at 20 m/s brakes and slides to a stop. If the coefficient of kinetic friction between the pavement and the tires of the car is 0.1, how far does the car slide?
A. 50 m
B. 100 m
C. 200 m
D. 400 m
2. A car moving at 20 m/s brakes and slides to a stop. If the coefficient of kinetic friction between the pavement and the tires of the car is 0.1, how much time is needed for the car to come to a complete stop?
A. 1 s
B. 10 s
C. 20 s
D. 40 s
Homework Equations
U(k)mgcos0
The Attempt at a Solution
Well the answers for both are C, as the back of the book states. The problem is, I don't understand how you can figure out either the time or distance with the information given... can anyone shed some light?