This video has been nominated as a duplicate of this video by eric3579. If this nomination is seconded with *isdupe, the video will be killed and its votes transferred to the original.

I was hit in the back of the head by a golf ball that skipped off the cart path. That hurt bad enough. I cant imagine one on the fly like this.

In the summer of 85' I was in Hockley Texas and witnessed a hailstorm the likes of which I hope to never see again-Hailstones ranged in size from golf ball to conglomerates larger than a football. All roofs destroyed, all cars hammered silly, craters in the ground that needed to be filled...yer basic wrath of Jupiter-type storm.

This is what happens when you fuck around with golf balls on ice covered lakes.

Your video, A Bouncing Golf Ball On A Frozen Lake., has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

guys who can shoot a golf ball or hit a golf ball are not great men.

Schwarzenegger a great man? yeah no.

Stop putting them on a pedestal.

>> ^Barbar:

Applying the oversimplified version of laws that you learned in early physics classes to reality can often leave you in stunned silence when reality seems to defy them. Things like the dimples on golf balls or sailing ships moving upwind are classic examples of things that you wouldn't expect to even be conceivable unless you saw it in action.


Conceivable or not, none of the things you mentioned break the first law of thermodynamics.

One situation where the system could work would be if the car was driving into a strong headwind. This would give an energy input into the system. It could be perhaps developed to extend the blades if there is a strong enough headwind, and retract them if there isn't, but if there is no breeze, there will be a net loss from using the blades.

If the car is driving through stationary air then the air it's passing through will have no kinetic energy. After passing over the blades the air will be moving, it will have gained kinetic energy. That energy will have been taken from the car. It's as simple as that. No complicated equations needed. You'd need the complicated equations if you wanted to calculate exactly how much energy is lost, but you don't need them to see that energy would be lost.

If wind is factored into it then the air already has kinetic energy, which would be extracted by the fan, but the wind would be and external source of energy (in the same way that a wind turbine isn't in any way a perpetual motion device, it's obvious where the energy is coming from).

I'm not sure why people seem to think this is an elementary problem. I seriously doubt that most people in this discussion studied anywhere near the math and physics required in the calculation in middle school, or even high school, or college for that matter. Having studied physics and math at all those levels, I know that wind turbines were NEVER part of the discussion. After looking up the relevant equations, I can see why -- they're certainly not trivial, and would probably required significant calculus to understand (derive). In university my physics courses were directed towards electricity, so I didn't get a chance to play with wind tunnels -- although I'd still love to!

Applying the oversimplified version of laws that you learned in early physics classes to reality can often leave you in stunned silence when reality seems to defy them. Things like the dimples on golf balls or sailing ships moving upwind are classic examples of things that you wouldn't expect to even be conceivable unless you saw it in action.

>> ^mizila:

>> ^jimnms:
If they coated boat hulls with this stuff, would they cut through the water more efficiently?

No, that's how you make hovercrafts. :-P
But seriously, smooth hulls are actually bad for speed. Ideally you want little pockets of air to make a good boundary for the laminar flow of water going past. Some people even sand the hulls of their racing boats. Think about the dimples on a golf ball, same idea. Although it'd be an awesome product for the windshield of a boat. =)


Yep good point, and if you look at/touch shark skin, it's essentially sand paper; helps them move faster through water apparently.

>> ^jimnms:

If they coated boat hulls with this stuff, would they cut through the water more efficiently?


No, that's how you make hovercrafts. :-P

But seriously, smooth hulls are actually bad for speed. Ideally you want little pockets of air to make a good boundary for the laminar flow of water going past. Some people even sand the hulls of their racing boats. Think about the dimples on a golf ball, same idea. Although it'd be an awesome product for the windshield of a boat. =)

>> ^GenjiKilpatrick:

I think they made their point with the 20 golf balls ...did they really need two hotdog demos?

Yeah ... maybe they should have considered something else [like kielbasa perhaps] =o)

I think they made their point with the 20 golf balls ...did they really need two hotdog demos?

You told me what they are not but not what they are, you told less than half thes tory, golfed one shot out of par. Started the hole but didnt finish it. I could go on.

Can you see a star from where you are ? I can see one out the crack in the curtain.
In reply to this comment by berticus:
golfing analogies are lost on me sorry :
In reply to this comment by BoneRemake:
You wanna putt the golf ball into the cup or just drive the ball ?
In reply to this comment by berticus:
they weren't aliens
>> ^BoneRemake:

Grooved hard to this over the past month, watched the movie because of it.. again Spielberg with the flipping aliens.. at least it made more sense than Indiana 4.
righteous song.
promote
I like your floor.

You wanna putt the golf ball into the cup or just drive the ball ?
In reply to this comment by berticus:
they weren't aliens
>> ^BoneRemake:

Grooved hard to this over the past month, watched the movie because of it.. again Spielberg with the flipping aliens.. at least it made more sense than Indiana 4.
righteous song.
promote
I like your floor.

Tags for this video have been changed from 'excavator, beer, bottle, golf ball, bobcat ninja' to 'excavator, beer, bottle, golf ball, stack, bobcat ninja' - edited by calvados