Soccer is becoming more and more popular in the United States. And while other soccer-related injuries are happening less frequently, youth soccer players in the United States are experiencing more concussions. A concussion is a type of traumatic brain injury caused by the head experiencing an impact and moving quickly back and forth, causing the brain to bounce around in the skull.
A concussion can result from a force of 400–1,000 N on the head. There has been debate in different sports about how to best prevent concussions. In soccer, one idea is to ban headers (when a ball makes contact with a head) in youth and professional soccer.
Question 1
1.
How would the forces from a header with such a light soccer ball cause a concussion?
Draw arrows in the free-body diagram to show where the force is pushing on each object.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
Question 8
8.
There are three types of collisions that tend to happen frequently in soccer: (a) headers, (b) collisions between players’ heads, and (c) a player’s head hitting the ground.
How would the amount of force on the head compare to the amount of force on the object it collides with (another head, a soccer ball, or the ground) in each system A, B, and C?
A. In every collision, the peak force on the head would be the SAME as the peak force on the other object in the collision.
B. In some, but not all collisions, the peak force on the head would be the SAME as the peak force on the other object in the collision.
C. In every collision, the peak force on the head would be DIFFERENT than the peak force on the other object in the collision.
Choose 2 true statements that support Question #2
Forces always come in pairs, they are acting on each other
The force is always greater on the object that has more mass
The force is always greater on the object that has more kinetic energy before the collision
Peak forces are always equal to each other in size, even if one object has more mass or speed before contact
Peak forces between 2 objects in a collision are always
different (one is more than the other)
equal (the same)
Objects that are NOT moving have Kinetic Energy
True
False
If an object in a collision has more mass, the forces on both objects will be
More
Less
The same as before
If an object in a collision is going slower, the forces on both objects will be
More
Less
The same as before
Greater forces in a collision = greater damage or shape change