Trivia

[Casper34]

ok i have one.

why do you PARK on a DRIVEway, and DRIVE on a PARK way?

[spyderchick]

ok i have one.

why do you PARK on a DRIVEway, and DRIVE on a PARK way?

That's not trivia, that's etymology. ;D

[gsxr_rcr]

ok you smart a$$'s if a motorcycle crashes on concrete with a drag coefficent of .70 for 70 feet then the bike slides on grass that has a drag coefficent of .45 for 300 feet what was the minimum speed of the motorcycle prior to it being crashed.

15 points I'm very giving.

Also if the motorcycle had a larger tire would the motorcycle still crash??  Lets assume the tires slid out during the crash, no outside objects made the bike go down.


And finally if a car locks up the rear brakes from a high rate of speed on a  left hand curve, when the car comes to a final stop where will the skid marks be in relation to the front of the car??

10 points

[gma]

74.1648366 mph

For the second question, what is a larger tire? 'larger' needs more definition.

The third doesn't have enough info.

[Casper34]

That's not trivia, that's etymology. ;D

ok but in this case it is trivia, cause if you PARK on a PARKway you would get hit, and if you were to DRIVE on a DRIVEway you would hit your house :P

[spyderchick]

ok but in this case it is trivia, cause if you PARK on a PARKway you would get hit, and if you were to DRIVE on a DRIVEway you would hit your house :P

Not necessarily. The parkway I live by has parking lanes, and if I drive up my driveway, it's to my parking spot or into my garage. Do you stop at the end of your driveway and not go any further?

[gsxr_rcr]

74.1648366 mph

For the second question, what is a larger tire? 'larger' needs more definition.

The third doesn't have enough info.

wrong mph, larger means wider tire, and there is enough info for the third question.

[gma]

1. Show me your math.

2. I still don't think that the definition of the tire is enough to answer the question. In short, a larger contact patch may imply less likelihood of loss of traction, but there still isn't enough information.

3. I still insist that the question is too vague - give more definition. Remember - driver intput is a varable that is not discussed in your question and is a variable that will influence the answer.

[gsxr_rcr]

1. Show me your math.

2. I still don't think that the definition of the tire is enough to answer the question. In short, a larger contact patch may imply less likelihood of loss of traction, but there still isn't enough information.

3. I still insist that the question is too vague - give more definition. Remember - driver intput is a varable that is not discussed in your question and is a variable that will influence the answer.

#1 Math is square root of 30[(d1f1)+(d2f2)]
 
I came up with 74.296702488402 mph
so your close i'll give you 10 points of 15

#2 a larger tire wouldn't matter because the motorcycle reached critical yaw to lose traction.

#3 the tire marks would always be left behind the front of the vehicle as the rear tires are always behind the front of the car  (tricky question).

good try!!

[gma]

#1 Math is square root of 30[(d1f1)+(d2f2)]
 
I came up with 74.296702488402 mph
so your close i'll give you 10 points of 15
 
***

run this and see what you get ...

SQRT (2 * 32.1740486 ft/sec^2 * ((.7 * 70 ft) + (.45 * 300 ft))) * 3600 sec / hr  / 5280 ft / mi

***

#2 a larger tire wouldn't matter because the motorcycle reached critical yaw to lose traction.
 
***

The question's still too vague. Motorcycles crash for other reasons. I see your point, but I challenge the presentation of the question.

***

#3 the tire marks would always be left behind the front of the vehicle as the rear tires are always behind the front of the car  (tricky question).
 
***

Let's sit with a pen and paper after a race. You're actually intriguing me (and we're boring many others ... tee hee hee) and I'd love to entertain the physics of racing some time.

Here's one for those who haven't yet tired of this thread ...

How does a fan tilted at 85 degrees to the horizon hold a beach ball in a column of air?

[tzracer]

The correct answer is 74 mph, actually 7.4 x 10^1 mph would be better. By your data you can only keep 2 significant figures (300 could actually be taken as 1 significant figure - then the correct answer would be 7 x 10^1 mph or 70 mph).

Don't try to play physicist when a physicist is around.

[gma]

touche, brian ... you're correct ...