Hi there ,
Kicking movement in football is a relatively easy series of rotational movements. In this movement, the aim is to produce through the kinematic chain of body segments, high angular velocity to the foot. The length of the body segments or the radius of rotational movements influences the linear velocity of the rotating foot. Thus the body height and lengths of different body segments are an advantageous feature for players, because the linear velocity of rotating levers can be expressed as a product of the radius of rotational movement and angular velocity.

The role of the arms in kicking is primarily to maintain the balance of the body. The arms are usually extended out to the sides of the body during the forward motion of the kicking leg, to help to keep the center of gravity over the support foot, and to increase the moment of inertia of the trunk and increase resistance to rotation around the spine, or the long axis of the body. As the kicking foot contacts the ball, the opposite arm moves forward and upward across the body to help keep the trunk down and the body in balance.

The momentum of the kicking foot and leg is the product of the mass of the leg and the velocity of the foot at impact, plus the velocity of the body as the player approaches the ball. The greater the mass of the leg, and the greater the velocity of the foot at impact, the greater the resultant velocity of the ball at impact.

The instep kick is the most powerful kick in the sport of soccer. Basically, the instep is the region on top of the foot where the shoelaces are tied.

I hope that i wasn't confusing..!!!!!!

Cheers.