6. a box has a mass of 60 kg and is pulled with a rope along a level surface to the right. the coefficient of kinetic friction between the box and the surface is 0.5 and the coefficient of static friction between the box and the surface is 0.9. the box moves to the right but slows down at a rate of 3 m/s 2 a. what kind of friction acts on the block? static, kinetic, or both. please explain your answer and find the magnitude (size) of that force.
