Kugwiritsa ntchito lamulo la Newton loyendetsa galimoto mu elevator - mavuto ndi mayankho

1. Munthu wolemera makilogalamu 50 mu elevator. Kuthamanga chifukwa cha mphamvu yokoka = 10 m/s ² . Dziwani mphamvu yachibadwa yomwe imagwiritsidwa ntchito pa chinthucho ndi elevator, ngati:

(a) elevator ili pamalo opumulira

(b) chikepe chikuyenda pansi pa liwiro losasintha

(c) chikepe chokwera mmwamba pa liwiro losalekeza 5 / s ²

(d) chikepe chotsika mofulumira pa 5 m/s ²

(e) chikepe mu kugwa kwaulere

Anakonza

Zodziwika:

Kulemera kwa munthu (m) = 50 kg

Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s ²

Kulemera (w) = mg = (50)(10) = 500 Newtons

Kufunidwa: Mphamvu yachibadwa (N)

Yankho:

(a) elevator ili pamalo opumulira

Chikepe chili pamalo opumulirako kotero palibe kuthamanga (a = 0)

Timasankha njira yopita mmwamba m'njira yabwino ndi njira yopita pansi m'njira yoipa.

Σ F = ma

N – w = 0

N = w

N = 500 Newton

(b) chikepe chikuyenda pansi pa liwiro losasintha

Liwiro lokhazikika kotero palibe kufulumira (a = 0)

Timasankha njira yopita mmwamba m'njira yabwino ndi njira yopita pansi m'njira yoipa.

Σ F = ma

N – w = 0

N = w

N = 500 Newton

(c) chikepe chokwera mmwamba pa liwiro losasintha la 5 m/s ²

Njira yopititsira patsogolo liwiro ndi yokwera, kotero timasankha njira yabwino ngati mmwamba.

N – w = ma

N = w + ma

N = 500 + (50)(5)

N = 500 + 250

N = 750 Newton

Munthuyo amamva pansi likukwera mmwamba kwambiri kuposa pamene elevator ili pamalo amodzi kapena ikuyenda ndi liwiro losalekeza.

Ngati munthuyo aima pa sikelo, sikeloyo imawerenga kukula kwa mphamvu yotsika yomwe munthuyo ali pa sikeloyo amagwiritsa ntchito. Malinga ndi lamulo lachitatu la Newton, izi zikufanana ndi kukula kwa mphamvu yokwera yomwe munthuyo ali nayo pa sikeloyo.

(d) chikepe chotsika mofulumira pa 5 m/s ²

Njira yopititsira patsogolo liwiro ndi yotsika, kotero timasankha njira yabwino ngati yotsika.

w – N = ma

N = w – ma

N = 500 – (50)(5)

N = 500 - 250

N = 250 Newton

Kulemera kwa munthuyo ndi 250 N, komwe ndi kochepa kuposa kulemera kwenikweni w = 500 N.

(e) chikepe mu kugwa kwaulere

Kugwa kwaulere kumatanthauza kuti kuthamanga kwa elevator kuli kofanana ndi kuthamanga chifukwa cha mphamvu yokoka. Kukula kwa kuthamanga chifukwa cha mphamvu yokoka ndi 9,8 m/s ² , komwe ikupita pansi kupita pakati pa Dziko Lapansi. Liwiro limawonjezeka molunjika munthawi ndi 9,8 m/s pa sekondi iliyonse.

Njira yopititsira patsogolo liwiro ndi yotsika, kotero timasankha njira yabwino ngati yotsika.

w – N = ma

N = w – ma

N = 500 – (50)(10)

N = 500 - 500

N = 0

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2. Dziwani mphamvu ya chingwe cha elevator. Kulemera kwa elevator = 2000 kg.

(a) elevator ili pamalo opumulira

(b) chikepe chotsika mofulumira pa 5 m/s nthawi zonse ²

(c) chikepe chokwera mmwamba pa liwiro losasintha la 5 m/s ²

(d) chikepe mu kugwa kwaulere

Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s ²

Anakonza

Zodziwika:

Kulemera kwa elevator (m) = 2000 kg

Kuthamanga kwa mphamvu yokoka (g) = 10 m/s ²

kulemera (w) = mg = (2000)(10) = 20,000 Newtons

Kufunidwa: Mphamvu ya kukakamira (T)

Yankho:

(a) elevator ili pamalo opumulira

elevator ili pamalo opumulirako kotero palibe kuthamanga (a = 0)

Timasankha njira yopita mmwamba ngati njira yabwino ndi njira yopita pansi ngati njira yoipa.

Σ F = ma

T – w = 0

T = w

T = 20,000 Newtons

Kupsinjika kwa chingwe (T) = kulemera kwa elevator (w) = 20,000 Newtons

(b) chikepe chotsika mofulumira pa 5 m/s nthawi zonse ²

Njira yopititsira patsogolo liwiro ndi yotsika, kotero timasankha njira yabwino ngati yotsika.

w – T = ma

T = w – ma

T = 20,000 – (2000)(5)

T = 20,000 – 10,000

T = 10,000 Newtons

c) chikepe chokwera mmwamba pa liwiro losasintha la 5 m/s ²

Njira yopititsira patsogolo liwiro ndi yotsika, kotero timasankha njira yabwino ngati mmwamba.

T – w = ma

T = w + ma

T = 20,000 + (2000)(5)

T = 20,000 + 10,000

T = 30,000 Newtons

(d) chikepe mu kugwa kwaulere

Njira yopititsira patsogolo liwiro ndi yotsika, kotero timasankha njira yabwino ngati yotsika.

w – T = ma

T = w – ma

T = 20,000 – (2000)(10)

T = 20,000 – 20,000

T = 0

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1. Kulemera ndi kulemera
2. mphamvu yachibadwa
3. Lamulo lachiwiri la Newton la kayendedwe
4. Mkangano mphamvu
5. Kuyenda pamwamba mopingasa popanda mphamvu yokangana
6. Kuyenda kwa matupi awiri ndi kuthamanga komweko pamalo opingasa ozungulira ndi mphamvu yokangana
7. Kuyenda pa ndege yopendekeka popanda mphamvu yokangana
8. Kuyenda pa ndege yokhotakhota ndi mphamvu yokangana
9. Kuyenda mu elevator
10. Kuyenda kwa matupi kumalumikizidwa ndi zingwe ndi ma pulleys
11. Matupi awiri omwe ali ndi kukula kofanana kwa kuthamanga
12. Kuzungulira makona osalala - mphamvu ya kayendedwe kozungulira
13. Kuzungulira mkombero wozungulira - mphamvu ya kuyenda kozungulira
14. Kuyenda kofanana mozungulira mopingasa
15. Mphamvu yapakati yozungulira yofanana