Minggu, 06 April 2014

Choose only one of the following helmet types to research:?

Q. Choose only one of the following helmet types to research:
⢠bicycle
⢠space suit
⢠motorcycle
Report on your work in a well-organized and well-written
report. Your report must include relevant sample calculations
and examples; a thorough discussion of the principles of physics
described in this unit; and appropriate diagrams and notations to
demonstrate your understanding of the relationship between the
design of the helmet and its use.
Thanks in advance!


Answer
go for motorcycle helmets as there is lots of info on how they are made & testing +the bs , ce , snell. eu, standards & lots of others,

Motorcycle helmet advice!!!?

Q. I just got a new scooter, 150cc, so it's classified as a motorcycle.

I need a helmet though! Which is safer, a full face helmet, or a modular helmet??

Are they about as same? I mean, they cover the same amount, right??

Take in mind that I'm not going to be riding faster than 40 mph, and I'm only going to be driving it to work (5 miles away) and to school (4 miles away). I live in a small city, and the speed limit is 35 mph.

So any advice is helpful!! Thanks!


Answer
Either full face or modular is fine. However, whichever you choose, make sure the inside of the chin bar has the same hard, energy-absorbing foam that the crown region of the helmet has. The foam, not the shell, does the real work of preventing brain injury because it crushes gradually if you get smacked in the face in a crash, and it's that gradual crushing that minimizes the jolt to your head that causes brain injury. (Notice that bicycle helmets are all foam and no shell and do a good job of preventing injury, while "beanie" helmets worn by Harley riders are all shell and no foam and don't do squat to reduce brain injury or death.)

Now, contrary to what another contributor wrote, don't worry whether a helmet is Snell approved or not. There's never been a study published anyplace that shows Snell-certified helmets are better at preventing brain injury or death than DOT-only helmets. However, it's amply clear that Snell-certified helmets cost a LOT more.

Follow the link below to the best available article on helmets and helmet performance, standards, etc. You'll see that most of the world's experts on helmets and head injuries think Snell is bass-ackwards and needs some 21st century updating instead of the 1950s mentality that still pervades it.

BTW, your speed doesn't matter all that much. Published research on motorcycle crashes suggest that crash speeds average about 20 mph. The average crash speed in fatal crashes in about 35 mph.

Take a rider training course from the Motorcycle Safety Foundation (www.msf-usa.org) to reduce your crash risk in the first few months. You'll learn a lot.




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