How far can you break?

pj

Donkey Bruce said:

See what happens when you ban Patrick Johnson?

Sent from my LG-P500 using Tapatalk

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Did pj get banned ??

What fer ? (I think I mighta-kinda miss him in some weird way) :shrug:

Btw: as ridiculous as this thread is , 80m is about 250 ft.

This thread has to go into the "pointless thread hall of fame".
I'm ashamed to have read it.

When I was a kid we used to drive golf balls across a frozen pond in the winter time. It was amazing how far you could hit a ball.....

kolaas said:

Im serious, I wonder how far it will roll. It can probaby be calculated but I dont know the math (or the physics) to do it.

My guess is that I'll make 100m.

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Well, seeing that a meter is about 39" long, a 100m would be over a hundred and ten yards, would it even matter because the cue ball would be going so slow by then, that 4 balls would not hit a rail ....

Dunnn51 said:

Did pj get banned ??

What fer ? (I think I mighta-kinda miss him in some weird way) :shrug:

Btw: as ridiculous as this thread is , 80m is about 250 ft.

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Banned to the max - he got 2 years, more than some get for armed robbery.

how high would a pool ball bounce, if thrown onto the paved parking lot surface and a 9' table that is only 8.33' long Simonis deflection?

Figure that.

While the cue ball is skidding (sliding fricition) I agree that the friction is around 0.2.

Assuming that the cueball results in a rolling speed of 20mph ~ 9 m/s, the coefficient of rolling resistance would be in the 0.005 - 0.015 range.

Not sure that a 20mph rolling speed could be reached though since that would result in an angular velocity of over 300 radians/second (50 rotations per second)

Note: I have probably chased the cueball over 100 feet (30 m) a couple times on high traffic carpet.

EDIT: Curvature of the earth has not been taken into account!

eastcoast_chris said:

Here are my calculations ....

Using metric;

Cue ball weight = 5.5 oz = 0.156 kg
Friction = 0.2 (typical, could be a bit lower for 760, etc.)
Break speed = 30 mph = 13.41 m/s

KE = 0.5*W*Speed*Speed
KE = 0.5*0.156*13.41*13.41
KE = 14.02 J

Fn = Friction * Mass * Acceleration
Fn = 0.2 * 0.156 * 9.81
Fn = 0.306072

Distance = KE / Fn
Distance = 14.02 / 0.306072
Distance = 45.81 Meters

Which seems about right .... half a football field till it would stop rolling when hit at 30 mph assuming a coefficient of friction of 0.2

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dfweyer said:

While the cue ball is skidding (sliding fricition) I agree that the friction is around 0.2.

Assuming that the cueball results in a rolling speed of 20mph ~ 9 m/s, the coefficient of rolling resistance would be in the 0.005 - 0.015 range.

Not sure that a 20mph rolling speed could be reached though since that would result in an angular velocity of over 300 radians/second (50 rotations per second)

Note: I have probably chased the cueball over 100 feet (30 m) a couple times on high traffic carpet.

EDIT: Curvature of the earth has not been taken into account!

Click to expand...

Seems like you looked at the same page as I did for the resistance...

In the case of a cue ball, I think most of its momentum will be dissipated by the sliding resistance and the rolling resistance will only come into play when the ball's rotation can "catch up" with it actual speed. (if that makes sense?)

My guess would be in the 70-80 meter range if hit on a football sized table of 860 cloth.

how far

Way back in the day, Celebrity Lanes in Denver used to have a billiard "putt putt" course.

I was a bit younger then but I remember one "hole" that had a long straight lane to a 90 degree turn. To make the corner you kinda had to hit a lot of english and barely miss the far point, banking off the long rail back into the short. It must have been a 30 foot shot or so.... (if memory serves).

I clearly remember shooting up and backs to test my stroke and hit on center ball. I could often "hit the lane" by shooting a double bank - and having to ease up, not using full break speed.

That would be 120 feet or so...... if my memory is anywhere close on the table size.

Yes, the rails killed the roll.... not so much the distance. But I would seriously doubt the possibility of a multiple-hundred yard stroke on the same cloth they were using..... at least on a level surface....

It's been done: http://newsgroups.derkeiler.com/Archive/Rec/rec.sport.billiard/2011-07/msg00029.html