A mass M slides downward along a rough plane surface inclined at angle Θ to the horizontal. Initially the mass has a speed Vo before it slides a distance L down the incline. The coefficient of kinetic friction between the mass and the incline is μ The power associated with the work done by the frictional force WI is positive The power associated with the work done by the gravitation force is negative The power associated with the work done by the normal force is zero