Which forces are important in Soccer?

Gravity is important because when you kick the soccer ball and it reaches its max height gravity will cause the ball to fall back down to earth.

Friction is important because if you kick the ball on the ground the friction between the ball and the grass will keep it from rolling forever.

Also an applied force is important because without an applied force the ball would never move. When you kick the ball and make contact with it is the applied force.