Dropping helmets

Also didn't one of the magazines do a test where they discovered a helment had to be dropped from at least ~3 metres to cause damage to warrant replacement? That's one tall bike

Originally Posted by muffles

Also didn't one of the magazines do a test where they discovered a helment had to be dropped from at least ~3 metres to cause damage to warrant replacement? That's one tall bike

Yeah, think it was Ride.

Originally Posted by muffles

You could work it out, you just need to figure out how fast the helmet will be travelling.

Of course that ignores the (very important) fact that nothing is generally inside the helmet when you drop it off your bike...

Who told you this?

The weight of the item does not determine its acceleration due to gravity (this is fixed at 9.81m/s2). The weight does however affect the terminal velocity, but over such a short distance I dont think the helmet would reach its terminal velocity anyway. God damn, thats the first time my physics lesson's have come in handy, lol

Originally Posted by AndyL

God damn, thats the first time my physics lesson's have come in handy, lol

Thought it was common sense?

Originally Posted by Dangerous Dave

But the helmet does not have the weight of your head in it, gravity will not replicate that at low height.

Personally I would replace the helmet, two big offs and I have never sustained any serious head injury so I appreciate the importance of a 100% helmet.

+1, a good helmet is the first and most important bit of protection for the bike rider.



Think about it, you wouldnt jump out of a plane if you werent certain that the paracute worked 100%!!

Originally Posted by Dangerous Dave

Thought it was common sense?

Only for us smart ones, lol.

Originally Posted by AndyL

The weight of the item does not determine its acceleration due to gravity (this is fixed at 9.81m/s2). The weight does however affect the terminal velocity, but over such a short distance I dont think the helmet would reach its terminal velocity anyway. God damn, thats the first time my physics lesson's have come in handy, lol

Ignoring air resistance, right?

The main thing I think is the stopping though - that's where the "nothing inside" comes in

I'd definitely agree if you can't get it confirmed good (X-ray) then it's probably a better idea to get a new one...

Originally Posted by muffles

Ignoring air resistance, right?

Correct

Originally Posted by AndyL

Correct

[Brainiac]
I can do science, me!
[/Brainiac]

Get it x-rayed!