i don't know how to solve this problem..
a box (m=30kg) is sliding along a path with initial speed of 5m/s. using the definition of energy and work determine how far the box will go before stopping. (uk=0.04)
Lets also assume that gravitational acceleration is g = 10 m/s/s.
So the initial kinetic energy of the box is
Nm
The frictional force opposing motion is
N
So the work done by friction to overcome the initial kinetic energy is
where d is the distance oevr which the force has acted. To stop the box the W = E, therefore
m
Hope this helps.