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Re: 11 Car Myths You Should Stop Believing Today by airminem(f): 4:44pm On May 04, 2017 |
No 10, Synonymous to Naija Guys |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 5:49pm On May 04, 2017 |
DollarAngel: Dude. You stood to be corrected. U will be corrected. Even if I run with my two legs at 30km/h and a Bugatti slowly drags at 25km/h say in a big office complex or campus. I will be faster than the Bugatti. It is because I am covering MORE distance per time. Its plain physics. At the instant the Bugatti overtakes the Camry, it won't be at that initial speed or 80km/h, it will ACCELERATE. The Bugatti will likely overtake the Camry, because at that instant it cud accelerate from 80 to 180 km/h in a few seconds... But at the initial speeds of both the Camry and the Bugatti, the Camry is faster. 80km/h is the same with a Bugatti and a horse. Speed is a physical quantity.. A horse galloping at 50km/h is faster than a Hennessey venom at 40km/h because irrespective of the bodies undergoing motion, 50km/h is more speed and us faster than 40km/h. PS. Supercars create the FEEL of superspeed with thier suspension, handling and transmission systems. 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by makavele: 5:50pm On May 04, 2017 |
UJIC: Na u dey use ur own hand confuse yourself they started from rest ------> acceleration which has already defeated the purpose. To measure speed; especially uniform velocity discrepancies; both vehicles must hav attained the same speedometer mark and must be side by side and no longer accelerating! Then u start measuring distance covered with respects to time ------> i.e. speed 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 6:05pm On May 04, 2017 |
zanga420:The Bugatti will accelerate faster and reach the 80km/hr before the corolla thus it will seem as if the Bugatti is "faster". It technically is. See the criteria for how fast a car is is first of all its top speed and then its acceleration. Its when u don't factor in acceleration that u ask questions like this 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 6:11pm On May 04, 2017 |
makavele: Lol...at last someone who is smart....when we scientists and engineers are dealing with calculus. By the way it is possible to factor in both acceleration and max velocity to calculate which vehicle will reach a particular destination or point first..using 2nd degree differential equations...and if there is much variation during the journey, partial differentials equations. Let them leave the physical science to the physical scientists. |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 6:13pm On May 04, 2017 |
abes: Smart!! Correct. Because bigger diameter of tires means longer circumference implying for every single rotation of the crankshaft or tires a longer distance is covered. |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 6:16pm On May 04, 2017 |
paulynpen: U didn't point out that u didn't move at the constant 80km/hr throughout the journey. The EOD will ACCELERATE faster to your cruise speed of 80km/hr and cover a faster distance in a shorter time than the Camry... Also facto in other things like transmission smoothness...traction at bends, tyre size |
Re: 11 Car Myths You Should Stop Believing Today by mykel25(m): 6:37pm On May 04, 2017 |
DollarAngel: You're wrong... Lemme make it plain.... 100Km/h means at the speed you're going it ll take you to 1hr to cover 100km ....hence vehicles running on same km/h either a Porsche, Ferrari or Toyota..... The only different thing is d RPM (revolution per minute) because the acceleration power of the vehicle is determined by the engine capacity and the streamlining of the body makes an addition to it I gave a friend fierce argument with proof when he said truck at 80km/h is faster than car at 80km/h....its impossible in that case RPM of a truck is Lower than car RPM because of the diameter of the tyres... Just the same way u ll cover more distance with a big bicycle than a very small one cycling at same rate .... If you use a GPS speed sensor you ll understand d operations of a speedometer 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by vickzie(m): 7:40pm On May 04, 2017 |
DollarAngel:wrong, its just like saying 1kg of stone is heavier than 1kg of cotton, they are all the same weight, same with speed, 100km/hr in Bugatti and 100km/hr in keke na thesame joor 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by UJIC(m): 7:47pm On May 04, 2017 |
OlujobaSamuel: So I guess that settles it, that the speedometer is just a calibration, a standard, while the actual speed and distance covered is wholly dependent on the car; the torque, horsepower, weight, acceleration and shape. An intel core i7 6700 is capable of a speed of 2.8ghz; official specification from intel. Samsung's ULV notebook may be maxed at 2.3ghz and Asus ROG may go beyond 2.8ghz while both notebooks has a core i7 6700 in them. |
Re: 11 Car Myths You Should Stop Believing Today by UJIC(m): 8:09pm On May 04, 2017 |
makavele: So I guess that settles it, that the speedometer is just a calibration, a standard while the actual speed and distance covered is wholly dependent on the car; the torque, horsepower, weight, acceleration and shape. An intel core i7 6700 is capable of a speed of 2.8ghz; official specification from intel. Samsung's ULV notebook may be maxed at 2.3ghz and Acer ROG may go beyond 2.8ghz while both notebooks has a core i7 6700 in them. My guy you're assuming all factors being equal when there are not. A speedometer reads same and is accurate to the highest extent when being fitted on an even machines but its purpose really is thwarted when fitted on two uneven machines. The distance between pole A and pole B is 12 footsteps; real fact as in standard. The distance between pole A and pole B is 12 footsteps for mr A and 7 footsteps for mr B. Isn't it logical? |
Re: 11 Car Myths You Should Stop Believing Today by OlujobaSamuel: 8:34pm On May 04, 2017 |
UJIC:sincerely, i dey always love to learn about other field, but pls leave me to dey rock my social sciences, that your computer language don dey scatter my head. na intro tech wey i learn about a decade back i dey use. *winks* |
Re: 11 Car Myths You Should Stop Believing Today by UJIC(m): 8:51pm On May 04, 2017 |
OlujobaSamuel: Lol. Hokay naaa |
Re: 11 Car Myths You Should Stop Believing Today by ableguy(m): 9:32pm On May 04, 2017 |
Re: 11 Car Myths You Should Stop Believing Today by klbakare(m): 10:20pm On May 04, 2017 |
DollarAngel:yes, u stand to be corrected. your stand is wrong, the o.p is right. 2 Likes |
Re: 11 Car Myths You Should Stop Believing Today by makavele: 12:57pm On May 05, 2017 |
myking95: WRONG !!! Let me correct this "bigger tyre impression" iF you like "drive" a presidential private jet on the road with 34" Rims and tyres; speed is speed . . it remains constant. Driving a car with larger rims and tyres at 120 km/h' side by side with a keke napep of 8" rims and tyres . . neither will overtake the other. The speedometer in a car gets its measurement from a sensor (vss ---> vehicle speed sensor); and it's mounted in the transfer case or axles (NOT MOUNTED ON THE TYRES) . . . if you 30" rims are doing 1 complete revolution (to cover e.g. 30 cm circumference in 4 seconds); the 8" keke napep tyres will do 3.75 revolutons (to cover the same 30 cm circumference in the same 4 seconds) Why? The keke napep tyres are small and will spin faster; the 30" tyres are larger and will spin slower . . and they will meet halfway; no victor nor vanquished !!! Take a small wristwatch set it at 12:00 sharp (12:00:00) and do the same for a very big wall-clock; if you can start both perfectly at the same time; are you saying the big wall-clock will move 3 seconds faster than the wristwatch (JUST BECAUSE THE HANDS ARE BIGGER) ? My brother think. #Food for thought 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 1:37pm On May 05, 2017 |
makavele: Wrong...the engines output produces a given number or revs per second and the resisting effect of the road to the tyre spin is taken care of by the torque. Almost all vehicles produce excess torque...to rotate the tires against the resistance of the road combined with Tue very clean weight...but more torque is still needed for a pleasurable drive. The excess torque ensures that 1000 rev per min remains 1000 rev per min (the transmission output, here not the input) regardless of the tyre size within a reasonable extent ( u can't put caterpillar sized tyres on an automobile engine and expect the rev per min to remain reasonably the same) So basically since the rev per min of the wheels remain the same, with only an increment in torque required to keep the new bigger sized tyre rotating at the same rev per min, for a given transmission output, the bigger sized tyres with bigger circumference will cover more distance per revolution and consequently more speed. That is why all vehicles have their recommended tyre size which amongst other things is necessary for accurate calibration. Hope u r clear now. Note tho, the increase in speed is in most cases not too much with max variations of about 5%. The whites understand this thus u see them giving clearances of about 5% for speed limit violations. |
Re: 11 Car Myths You Should Stop Believing Today by makavele: 2:06pm On May 05, 2017 |
myking95:Take a small wristwatch set it at 12:00 sharp (12:00:00) and do the same for a very big wall-clock; if you can start both perfectly at the same time; are you saying the big wall-clock will move 3 seconds faster than the wristwatch (JUST BECAUSE THE HANDS ARE BIGGER) ? If no answer; Let it rest, sir !!! 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 2:25pm On May 05, 2017 |
makavele: U r very wrong. So the circumference that the small clock subtends is the same with the circumference the big clock subtends...don't u know that the number of "circumferences"....subtended by the tyre size translates to the linear distance travelled by thr car? Work on your imagination. Your analogy is very very off point. Lemme put it to you with your own analogy. U factored in time, but forgot distance. If one of the clock's arm is 4 cm in radius and another 7 cm in radius 1st, different engines will be required to run them as more torque will be needed to rotate the bigger clock arm from the principle of moments (physics, if you don't knoe, u dnt know) 2nd, the longer clock arm has a larger circumference of about 2*3.142*7 = 44 cm approx The smaller clock arm has a circumference of about 2*3.143*4 = 26 cm approx. Now for a full revolution, the circumference of the clock arm if it is taken as the tyres, translates to the linear distance travelled. Simple straight distance in layman terms. So of the clock arm completes one revolution in a minute(assume it is the second arm) we have the larger arm going a distance of 44cm in one minute, and the shorter one going 26 cm in one minute. U see? So bigger tyres from the stated tyre size within a " reasonable limit" so as not to exceed the torque output of the vehicle transmission will amount to increased velocity. About the smaller tyres spinning faster, when a vertical load (like the car weigt) acts on a wheel, and the power driving the wheel is ij the wheels axis bigger wheels are needed to overcome the resistance of the ground reaction. Put simply taking the radius of the tyre as a lever (do a C.S in ur mind) the rotating shaft is the "point of effort" and the rim of the tyre is the point of load (resistance due to ground reaction to vehicle weight and friction), the longer lever will require less effort( which in this case is the rotating force of the drive shaft) to overcome the resistance. That is why big tyres are used for vehicles that have drive shafts on the axis of the wheels, but trolleys where the driving force is ABOVE the wheels( the trolley handle) can use small tyres. Its complex but simple physics. Don't argue, just learn I'm actually educating you. Just read, re-read this post, then read my previous post again...you will understand. By the way Im an engineer, and I did training courses from IFP school France on automobile engines with focus on maximizing efficiency. Even without that, I know what I'm talking about. Ur analogy is HOPELESSLY wrong. Thank me later for the education, especially about the 5% increment in velocity due to bigger tyres, it could save u hundreds if not thousands of dollars in speed tickets and arguing with the cops on an American road. |
Re: 11 Car Myths You Should Stop Believing Today by deleskizy: 5:23pm On May 05, 2017 |
[quote author=asumo12 post=HD56194351] [/quote. Oga Asumo1 , I get am before no be property |
Re: 11 Car Myths You Should Stop Believing Today by makavele: 6:46pm On May 05, 2017 |
myking95: See how person just balance for front of PC dey type rubbish with such magnanimity. I will come back to you with a scanned copy of handwritten calculations . . . and what the heck did you mean the circum the small clock subtends, is the same as the big clock By the way, I scored A in Physics (mechanics, thermodynamics and magnetism) all through and still "raping" physics till forever You will laugh at your folly later; no need to thank me bruh 1 Like 1 Share |
Re: 11 Car Myths You Should Stop Believing Today by Nobody: 8:00pm On May 05, 2017 |
makavele: Ignorance. I'll explain myself no further |
Re: 11 Car Myths You Should Stop Believing Today by Marshalrhino(m): 8:35pm On May 05, 2017 |
DollarAngel: Yes it can't. Use your head. Are speedometers partial? Even a beetle at 120km/hr is faster than a veyron at 80km/hr. Plz we all went to school. 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by makavele: 8:42pm On May 05, 2017 |
myking95: F00lishness . . . neither would I 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by UJIC(m): 10:19pm On May 05, 2017 |
makavele: Who A in Physics epp? |
Re: 11 Car Myths You Should Stop Believing Today by abes(m): 7:18am On May 06, 2017 |
makavele: They will both complete a revolution at the same time but distance covered will be different because the circumferences are not equal. See my proof below You are welcome to prove otherwise.
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Re: 11 Car Myths You Should Stop Believing Today by erico2k2(m): 2:32pm On May 10, 2017 |
abes:You did not attend all of your physics class, Let me add the bit you are missing,you 4got the drive shaft in the middle that is missing from your diagram, this is what determines the speed not the size of the Tyre. |
Re: 11 Car Myths You Should Stop Believing Today by erico2k2(m): 3:21pm On May 10, 2017 |
UJIC:E epp me Ohhh |
Re: 11 Car Myths You Should Stop Believing Today by abes(m): 8:10pm On May 10, 2017 |
erico2k2:Mr Einstein, the drive shaft and the Tyre complete one cycle at the same time ie they spin at the same rate, but because the tyre is the one in contact with the ground, in one revolution, the car covers the same distance as the circumference of the tyre NOT the circumference of the shaft even though the tyre and shaft revolve at the same rate. Do you need more explanation? |
Re: 11 Car Myths You Should Stop Believing Today by erico2k2(m): 8:21pm On May 10, 2017 |
abes:I hate it when people throw their dummy outta the pram let me remind you here, we are not talking distance but speed, we had this argument earlier and we even sighted what measures the speed on a car and at what point it is located, You need to understand the principles of how speed is measured. 1 Like |
Re: 11 Car Myths You Should Stop Believing Today by erico2k2(m): 8:32pm On May 10, 2017 |
abes:your shaft and wheel revolves at same speed, same time, now this is different from distance traveld Speed= Rate of change of the wheel remember I said Rate if you look at teh diagram bellow its a typical rear axle car Now explain how the size of the Tyre would influence the speed of the gear. The gears by the drive shaft is constant it does not change unlike the gears in the gear box hence the output speed at any point is constant btw the wheel and the drive shaft.
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