If a #1 kg# object moving at #10 m/s# slows down to a halt after moving #50 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?
First we must find the acceleration experienced by the object.
Here we will use the kinematic equation:
plug in our given data...
We can now use this acceleration to calculate force using
Kinetic friction is
The normal force in this case is the weight of the object.
Plugging in our values for