Quote Originally Posted by Teflon Don View Post
Quote Originally Posted by barbaro View Post
^ If he wasn't wearing a helmet he may have died.

Being in a coma that long cannot be good me thinks.
Maybe you are right. But the shaking of the brain is what causes injury. G forces are not changed with a helmet
Yes they are (to a degree), a helmet spreads the point of impact to a larger area and the impact absorbing liner slows down the impact.

Naturally you can smack your head so hard that helmet or not you are done for. but in most cases though it makes a hell of a difference, the helmet reduces the "G forces" enough for you to survive.




"A helmet reduces the impact of a crash using two methods: distributing the force over a large area and slowing down the impact.

Using the basic equation of force, Force = mass * acceleration, we can look at how these two methods reduce impact.

Force can be measured simply as total force (e.g. 100 Newtons) or quantified by force over area (e.g. Newtons per square centimeter). As a helmet spreads the force for one point to a larger area, the force/area measure is decreased. This reduces the force applied to a single area, however, the overall force applied is still the same.

Acceleration is the other part of the equation that a helmet works to minimize. Acceleration is often measured as length over time-squared (e.g. meters/second-squared). Upon impact, the helmet is designed to crush, and this process of crushing extends the amount of time involved for the head to come to a stop (or before it bounces). This increases the time value in the measure, and since the time measure is a squared value, the effects of increasing the time involved has a big impact on reducing the overall acceleration and subsequent force."