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.
Required
1 point
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Question 1
1.
How can the forces from a header with such a light soccer ball cause a concussion?
Draw one free-body diagram showing how the amount of peak force on the head
Draw one free-body diagram to show the amount of peak force on a soccer ball
Forces in a collision
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1 point
1
Question 2
2.
Choose a CLAIM by answering the question below.
There are three types of collisions that 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 in each system A, B, and C?
Required
3 points
3
Question 3
3.
Prove the claim above to be true.
- Use EVIDENCE from our classroom investigation to support your thinking.
- Next, use REASONING to explain how your evidence supports your claim.
(If finished) You can also create a model to explain your thinking.
Energy in Collisions
Required
0 points
0
Question 4
4.
Considering both objects that are about to collide in each interaction, which system would you predict to have the least amount of total kinetic energy in the system right before the objects collide? In each instance below, player #84 is running at a speed of 7 miles per hour.
Required
3 points
3
Question 5
5.
Prove the claim from Question 4 to be true. Use evidence from our classroom investigation to support your thinking. You can also create a model to explain your thinking.