Electric Bike 0-60 1 Second

[SEATALTEA]

Electric Motorbike Does 0 to 60 in Under One Second! : Gas 2.0

If only he'd have pedalled to assist the motor, he may have been quicker.

 

[lectureral]

Nice - not sure how it would look with a kiddie seat on the back though.

 

[Mussels]

That's one hell of a rubbish press release.

All this gives the driver a G-force three times more than that faced by a skydiver during freefall!

So what is the G force felt by someone in freefall?

This is the only demo of that bike that you will remember.
YouTube - KillaCycle Crash LA Wired NextFest

 

[Tiberius]

That's one hell of a rubbish press release.

So what is the G force felt by someone in freefall?

Its all part of the media's contribution to the public understanding of science.

An investigative reporter jumps off a tall building. "...Floor 101, floor 100, floor 99.... looking good so far."

Nick

 

[Patrick]

So what is the G force felt by someone in freefall?

More to the point, what's the magnitude of a G-force that's "three times more than that faced by a skydiver during freefall", which is what the bike's motor is capable of generating? Answers on a postcard please .

 

[lectureral]

I picked that up as well - I think that a skydiver in freefall will experience a g force of zero (at least once he or she reaches terminal velocity) so 3 times that is zero.

Do I win a prize? Where should I send my postcard?

 

[Tiberius]

I picked that up as well - I think that a skydiver in freefall will experience a g force of zero (at least once he or she reaches terminal velocity) so 3 times that is zero.

Do I win a prize? Where should I send my postcard?

Close, but its a bit more subtle than that. The G-force experienced is the combination of gravity and the acceleration he undergoes.

Suppose he steps out of a balloon as its simpler than jumping from an aircraft. On the balloon he experiences 1 G. As soon as he steps out he experiences 0 G. Then as the air resistance slows down the acceleration and he reaches terminal velocity, the G he experiences climbs back up to 1.

There is a sudden increase in G on landing. Let's assume he was clever enough to take along some equipment to reduce this.

Either way it was a nonsense comment in the article.

Nick

 

[lectureral]

I'll save myself the stamp then - I think you are right - but if the writer had checked with wikipedia he would have found :

"The g-force of an object is 0 g in any weightless environment such as free-fall or an orbiting satellite"

I guess they were thinking of freefall in a vacuum.

I suppose also that a skydiver experiences slightly less than 1g because the force is inversely proportional to distance squared.

Then there is three times "more than" - is that like a 300% increase - i.e. 4 times greater - or is "more than" mere surplusage - ie 3 times greater.

Maybe I have spent enough time now ...