The car's wheel with mass 1kg and radius 0.3m has initial speed 40rad/s.
When braked, the force push to the center of the wheel is 10N.
The car stops after 2s.
The Attempt at a Solution
This is what I did
Fc= Us.N= Us*m*g
so Us= Fc/mg
But why the problem gives so many information..about velocity..?