If an object is moving at #120 m/s# over a surface with a kinetic friction coefficient of #u_k=12 /g#, how much time will it take for the object to stop moving?
The object will stop in 10 seconds. Complete solution follows...
(if the motion is on a horizontal surface, it will be true that
Combining these two equations, we get
and, since we are told that
Now use the equation of motion