How Can Football Players Bend Their Midair Shots?

We need one thing – what about Newton secondly the law? This means that the velocity depends on the net force (F_net) and mass (m) of an object. It is often written as F_net =m × isbut we can reformulate as follows: and = F_net/m. Combining this with our own gravity, we get something very interesting:

Courtesy of Rhett Allain

Since gravity and acceleration depend on the mass of the ball, mass stops. We find that every object on Earth has a low acceleration of 9.8 meters per second (m/s).²). This means that if you drop a bowling ball and a marble at the same time, they will fall to the ground at the same time—even though the ball’s gravity is thousands of times higher. Amazing, right?

However, now, in the face of gravity, if you throw a ball up, its vertical speed will slow down, stop, and go backwards, and the speed will increase as it falls. In other words, it starts going down quickly after being hit, even if it is going up.

What about horizontal movement? Well, since there is no horizontal force after the first push, the ball continues to move forward at the same speed, just as it is in the air. People tend to think that the ball is falling because its motion is slow, but it is different. Without breathing it doesn’t slow down at all. It just stops because the ground gets in the way.

So what we get on the trajectory is the familiar parabola, which is often called a ballistic trajectory because it is the trajectory of any type of forceless trajectory, such as a cannon ball, a bullet, or a basketball. Any flying object in which gravity is the only (required) force acting on it will move in this manner.

Soccer With Air

Fortunately, Earth has air. But it really changes the game. Now there and a constant force acts horizontally, which we call air resistance, or drag, and pushes in the opposite direction to the ball’s movement.

Think of air molecules as little ping-pong balls. As a soccer ball travels through the air it collides with gazillions of these tiny air bubbles, and each collision creates a backward force; all together, this creates a sufficient force against air. The bigger the object, the more it collides.