Final answer:
Increasing the angle of the track will decrease the force of kinetic friction.
Step-by-step explanation:
Increasing the angle of the track will change the force of kinetic friction.
The force of kinetic friction is directly proportional to the normal force and the coefficient of kinetic friction.
As the angle of the track increases, the normal force changes. If the track is inclined at an angle, the normal force decreases.
Therefore, according to the equation F k = μkN (where F k is the force of kinetic friction, μ k is the coefficient of kinetic friction, and N is the normal force), if the angle of the track increases, the force of kinetic friction will decrease.