Ya, we need to stay safe as inertia can hurt our brains. Remember what happened to John last week...
I love to play football but I make sure I am careful by wearing a helmet and by being responsible.
Last weeks football game
John just got tackled! I hope he is ok.
Ow! My head hurts.
John's brain was hurt because when he was tackled his head hit the ground. The impact stopped his skull, but his brain continued to move and hit the inside of his skull due to its inertia.
Inertia causes an object to continue in its uniform motion in a straight line unless an unbalanced force is applied to the object. In this case, your son's head was the object and the impact he experienced with the ground caused his brain to hit his skull as it continued to move forward with the same velocity until his skull provided it with a force to stop its motion.
What do physics and inertia have to do with my son's concussion!
I wish people would pay attention in physics class when learning about Newton's first law of motion and inertia. Then maybe people would understand the importance of wearing seatbelts, putting children in rear-facing car seats and not do silly things such as tackling one another or jumping from cars or buses that are moving.
Concussion are the most common among traumatic brain injuries and occur 1.7 million times a year in the U.S. Most people with mild injuries recover fully, but it can take time. The best precaution one can take against a concussion is to protect one's brain from rapid back and forth movement.