Palomar mountain... Gravity game

[thieu]

So a rolling mass that's say 3 tons is going to be rolling at a higher speed (3 times?) down a slope compared to a 1 ton rolling mass?

Yes - if the aerodynamic efficiency, and the rolling resistance of the two is the same!

As the two get moving the 3x heavier mass is trading it's 3x gravitational potential energy to produce velocity, and it does so at the same rate as the 1x mass - the rate of acceleration remains the same. However when the 1x mass is trading all of it's gravitational energy to maintain the same velocity - it's terminal velocity - the 3x heavier mass is only using 1x gravitational potential energy and the remaining 2x energy continues to accelerate that mass even further - it's terminal velocity is higher.

So humperdinkel wins!

The main point is gravitational acceleration is only uniform in a vacuum - it does not apply in any other context.

Love the video Moto!

 

[Motogiro]

Yes - if the aerodynamic efficiency, and the rolling resistance of the two is the same!

As the two get moving the 3x heavier mass is trading it's 3x gravitational potential energy to produce velocity, and it does so at the same rate as the 1x mass - the rate of acceleration remains the same. However when the 1x mass is trading all of it's gravitational energy to maintain the same velocity - it's terminal velocity - the 3x heavier mass is only using 1x gravitational potential energy and the remaining 2x energy continues to accelerate that mass even further - it's terminal velocity is higher.

So humperdinkel wins!

The main point is gravitational acceleration is only uniform in a vacuum - it does not apply in any other context.

Yeah but... remembering f=ma the greater mass will require more force to accelerate it so although it is heavier in order to develop the same enertia they become equal.... in a vacuum

Edit: Actually that law still remains whether there is vacuum or atmosphere but rate of acceleration changes...

The vacuum part is relative to wind resistance. If we could take the mass of a marble and physically flatten it to create equal wind resistance the acceleration of the feather and the marble would at some point equal out...in a non vacuum...

 

[Kazza]

Yep, does look like fun

 

[Red Wazp]

Blah x factor mass blah!

Go back and do it no handed coasting and I'll be impressed. Really, I want to see the vid.

I practice no handed coasting on all my bikes on roads just a tight. Those switch backs are tough at 5-10 mph no handed. There is one on Iowa hill Road that is a left handed that I rarely can do without grabbing the bars.

 

[Wavex]

I tried to do Palomar blind folded once... tough.

 

[Red Wazp]

I tried to do Palomar blind folded once... tough.

:rof::rof::rof:

 

[Erci]

I'd be interested in reading that if you know where I can find it.

Here ya go: Keith Code: The Fine Art of Braking News Article :: MiniGPX.com

 

[Goop]

Sh!t, let's try it on skateboards while we're at it!

 

[Lefty]

Sh!t, let's try it on skateboards while we're at it!

You're crazy Bryan! Skateboards are waaay more dangerous than bikes...at least for old dudes like me..

 

[DefyInertia]

hahaha, nice. defy inertia biotches.

 

[DDS]

Just to shut you all up bickering:

Modern day sleighs combine light metals, steel runners, and an aerodynamic composite body. Competition sleighs must be a maximum of 3.80 m (12.5 ft) long (4-crew) or 2.70 m (8.9 ft) long (2-crew). The runners on both are set at 0.67 m (2.2 ft) gauge. Until the weight-limit rule was added in 1952, bobsleigh crews tended to be very heavy. Now, the maximum weight, including crew, is 630 kg (1,388.9 lbs) (4-man), 390 kg (859.8 lbs) (2-man), or 340 kg (749.6 lbs) (2-woman). Metal weights may be added to reach these limits, as greater weight makes for a faster run.

Bobsleigh - Wikipedia, the free encyclopedia

 

[Motogiro]

Just to shut you all up bickering:

Modern day sleighs combine light metals, steel runners, and an aerodynamic composite body. Competition sleighs must be a maximum of 3.80 m (12.5 ft) long (4-crew) or 2.70 m (8.9 ft) long (2-crew). The runners on both are set at 0.67 m (2.2 ft) gauge. Until the weight-limit rule was added in 1952, bobsleigh crews tended to be very heavy. Now, the maximum weight, including crew, is 630 kg (1,388.9 lbs) (4-man), 390 kg (859.8 lbs) (2-man), or 340 kg (749.6 lbs) (2-woman). Metal weights may be added to reach these limits, as greater weight makes for a faster run.

Bobsleigh - Wikipedia, the free encyclopedia

Who's bickerin!?

 

[Humperdinkel]

You're crazy Bryan! Skateboards are waaay more dangerous than bikes...at least for old dudes like me..

Maybe so but I reckon ozfazer would have a go at it on a kids scooter :rof:

 

[Humperdinkel]

Who's bickerin!?

Not me , it proves what I said at the start

 

[Motogiro]

Maybe so but I reckon ozfazer would have a go at it on a kids scooter :rof:

LMAO! :rof::rof:

 

[Lefty]

Maybe so but I reckon ozfazer would have a go at it on a kids scooter :rof:

At least a kids scooter has "handlebars", I might be dumb enough to try that! :BLAA:

 

[Wavex]

So now that we got everyone's attention, when is the next NorCal/SoCal party planned for?

 

[Motogiro]

So now that we got everyone's attention, when is the next NorCal/SoCal party planned for?

Now that's what I like to hear! Pre TG post TG?

 

[Lefty]

So now that we got everyone's attention, when is the next NorCal/SoCal party planned for?

Maybe we should think about semi annual rides?........

 

[Tailgate]

This is a terrible idea, folks!

...Shell Oil Company