Tweet
nakon obimnog istrazivanja, koje mi je bilo pred nosom, al ajd, dosao sam do saznanja, koje ce verujem dobro doci svima kada se zapitaju sta je to
g sila
nemorate verovati, ali izvor je wikipedia i ovo jos nema nigde na srpskom, bar nema preko googla
poceo sam temu na
tamo sam u principu dobio neka pojasnjenja, koja su donekle pomogla da neke stvari skontam, ali nikako da dobijem definiciju g sile
sve je pocelo ovde
http://www.cannonballforums.se/viewtopi ... &start=475
i jos koja stranica
dakle da pocnemo
citat:
g-force (also G-force, g-load) is a measurement of an object's acceleration expressed in g's. It may also informally refer to the reaction force resulting from an acceleration, with the causing acceleration expressed in g's. The g (pronounced /ˈdʒiː/) is a non-SI unit equal to the nominal acceleration due to gravity on Earth at sea level, defined as 9.80665 m/s2 (32.174 ft/s2). More precisely, g-force measures the net effect of the acceleration that an object actually experiences and the acceleration that gravity is trying to impart to it, as explained further below. The symbol g is properly written in lowercase and italic, to distinguish it from the symbol G, the gravitational constant, which is always written in uppercase; and from g, the symbol for gram, which is not italicised.
racunanje
* An object at rest with respect to the Earth experiences a g-force of 0 g + 1 g, or just 1 g ("normal weight").
* An object in free fall (accelerating downwards at 1 g relative to the Earth) experiences a g-force of −1 g + 1 g = 0 g ("weightless")
* An object accelerating upwards at 1 g relative to the Earth experiences a g-force of 1 g + 1 g = 2 g ("twice normal weight")
* An object accelerating downwards at 2 g relative to the Earth experiences a g-force of −2 g + 1 g = −1 g ("negative g").
ukratko
g sila je merenje ubrzanja nekog objekta izrazeno u g , isto tako merenje reakcije nekog objekta izazvane akceleracijom - izazivanjem ubrzanja izrazenog u g (sili)
tj. ne u m/s2 kao sto je realno po II Njutnovom zakonu F= ma odakle je F- sila, m- masa, a- akceleracija
to bi znacilo da ako se kocenje, kao usporavanje, onda u tom slucaju nemoze da se meri kao m/S2 - kocenje deluje na objekt u g sili, a ne kao jednako usporeno kretanje (brzina se ravnomerno smanjuje, u svakoj jedinici vremena tokom
kretanja brzina se smanji za istu vrednost. Veličina koja izražava to smanjenje naziva se
usporenje ili negativno ubrzanje)
akceleracija merena g silom - ne znaci da objekt ubrzava u sekundi na kvadrat
nego da telo ima ubrzanje izrazeno u g koja je definisana kao 9.80665 m/s
objekt u mirovanju ima silu od 1 g koja je prouzrokovana gravitacijom...
primer
ako pri brzini oko 30 m/s ( oko 110 km/h) udarite u ravan zid i zaustavite se za 0.2 sekunde, tada je deakceleracija 150 m/s2
moze se reci da ste iskusili g silu od 150/ 9.8g ili oko 15.3 g
ustvari prava g sila je malo veca i vuce prema dole, iz prostog razloga sto samim sedenjem u kolima "trpite" silu od 1g
ili
vozac trkackog automobila vozi brzinom od oko 50 m/s ( 180 km/h) i ulazi u L krivinu sa radijusom od 80 m.
iz toga je ubrzanje
ili 31.25 m/s2 iz cega proizilazi g sila od 31.25/9.8 = 3.19 g ( zanemarujuci gravitaciju)
primeri
-Formula One racing car driver David Purley survived an estimated 179.8 g in 1977 when he decelerated from 173 km/h (108 mph) to 0 in a distance of 66 cm (26 inches) after his throttle got stuck wide open and he hit a wall.
-Indy Car, Kenny Bräck crashed on lap 188 of the 2003 race at Texas Motor Speedway. Bräck and Tomas Scheckter touched wheels, sending Bräck into the air at 200+ mph, hitting a steel support beam for the catch fencing. According to Bräcks' site his car recorded 214 g.
Formula One drivers usually experience 5 g while braking, 2 g while accelerating, and 4 to 6 g while cornering. Every Formula One car has an ADR (Accident Data Recovery) device installed, which records speed and g-force. According to the FIA Robert Kubica of BMW Sauber experienced 75 g during his 2007 Montreal GP crash.
kihanje
- 2.9 g
kasljanje
- 3.5 g
http://www.hypertextbook.com/physics/me ... eleration/
g ne pripada SI sistemu mernih jedinica
G - gravitaciona konstanta
g- gram
g - g sila
ukratko
to je to
g sila
nemorate verovati, ali izvor je wikipedia i ovo jos nema nigde na srpskom, bar nema preko googla
poceo sam temu na
tamo sam u principu dobio neka pojasnjenja, koja su donekle pomogla da neke stvari skontam, ali nikako da dobijem definiciju g sile
sve je pocelo ovde
http://www.cannonballforums.se/viewtopi ... &start=475
i jos koja stranica
dakle da pocnemo
citat:
g-force (also G-force, g-load) is a measurement of an object's acceleration expressed in g's. It may also informally refer to the reaction force resulting from an acceleration, with the causing acceleration expressed in g's. The g (pronounced /ˈdʒiː/) is a non-SI unit equal to the nominal acceleration due to gravity on Earth at sea level, defined as 9.80665 m/s2 (32.174 ft/s2). More precisely, g-force measures the net effect of the acceleration that an object actually experiences and the acceleration that gravity is trying to impart to it, as explained further below. The symbol g is properly written in lowercase and italic, to distinguish it from the symbol G, the gravitational constant, which is always written in uppercase; and from g, the symbol for gram, which is not italicised.
racunanje
* An object at rest with respect to the Earth experiences a g-force of 0 g + 1 g, or just 1 g ("normal weight").
* An object in free fall (accelerating downwards at 1 g relative to the Earth) experiences a g-force of −1 g + 1 g = 0 g ("weightless")
* An object accelerating upwards at 1 g relative to the Earth experiences a g-force of 1 g + 1 g = 2 g ("twice normal weight")
* An object accelerating downwards at 2 g relative to the Earth experiences a g-force of −2 g + 1 g = −1 g ("negative g").
ukratko
g sila je merenje ubrzanja nekog objekta izrazeno u g , isto tako merenje reakcije nekog objekta izazvane akceleracijom - izazivanjem ubrzanja izrazenog u g (sili)
tj. ne u m/s2 kao sto je realno po II Njutnovom zakonu F= ma odakle je F- sila, m- masa, a- akceleracija
to bi znacilo da ako se kocenje, kao usporavanje, onda u tom slucaju nemoze da se meri kao m/S2 - kocenje deluje na objekt u g sili, a ne kao jednako usporeno kretanje (brzina se ravnomerno smanjuje, u svakoj jedinici vremena tokom
kretanja brzina se smanji za istu vrednost. Veličina koja izražava to smanjenje naziva se
usporenje ili negativno ubrzanje)
akceleracija merena g silom - ne znaci da objekt ubrzava u sekundi na kvadrat
nego da telo ima ubrzanje izrazeno u g koja je definisana kao 9.80665 m/s
objekt u mirovanju ima silu od 1 g koja je prouzrokovana gravitacijom...
primer
ako pri brzini oko 30 m/s ( oko 110 km/h) udarite u ravan zid i zaustavite se za 0.2 sekunde, tada je deakceleracija 150 m/s2
moze se reci da ste iskusili g silu od 150/ 9.8g ili oko 15.3 g
ustvari prava g sila je malo veca i vuce prema dole, iz prostog razloga sto samim sedenjem u kolima "trpite" silu od 1g
ili
vozac trkackog automobila vozi brzinom od oko 50 m/s ( 180 km/h) i ulazi u L krivinu sa radijusom od 80 m.
iz toga je ubrzanje
ili 31.25 m/s2 iz cega proizilazi g sila od 31.25/9.8 = 3.19 g ( zanemarujuci gravitaciju)primeri
-Formula One racing car driver David Purley survived an estimated 179.8 g in 1977 when he decelerated from 173 km/h (108 mph) to 0 in a distance of 66 cm (26 inches) after his throttle got stuck wide open and he hit a wall.
-Indy Car, Kenny Bräck crashed on lap 188 of the 2003 race at Texas Motor Speedway. Bräck and Tomas Scheckter touched wheels, sending Bräck into the air at 200+ mph, hitting a steel support beam for the catch fencing. According to Bräcks' site his car recorded 214 g.
Formula One drivers usually experience 5 g while braking, 2 g while accelerating, and 4 to 6 g while cornering. Every Formula One car has an ADR (Accident Data Recovery) device installed, which records speed and g-force. According to the FIA Robert Kubica of BMW Sauber experienced 75 g during his 2007 Montreal GP crash.
kihanje
- 2.9 g
kasljanje
- 3.5 g
http://www.hypertextbook.com/physics/me ... eleration/
g ne pripada SI sistemu mernih jedinica
G - gravitaciona konstanta
g- gram
g - g sila
ukratko
to je to