If a #3 kg# object moving at #5 m/s# slows to a halt after moving #10 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?
I will show you 2 different methods to do this question :
Method 1 - Using Newton's Laws and equations of motion
The acceleration of the object may be found from the equations of motion for constant linear acceleration as follows :
This acceleration is caused by the resultant force of friction acting on the object and by Newton 2 given as :
Method 2 - Using energy considerations
From conservation of energy, work done by friction equals change in kinetic energy brought about.