Misalai 2 na amfani da dokokin Newton ga tsarin ɗaukar igiya da pulley
1. Nauyin tubalin 1 shine kilogiram 2, nauyin tubalin 2 shine kilogiram 3, saurin gudu saboda nauyi shine mita 10/s2. Kayyade (a) girma da alkiblar hanzarta tsarin (b) girman ƙarfin tashin hankali akan igiya!
Tattaunawa
Misalai 4 na tambayoyi kan aiwatar da dokokin Newton game da motsi kai tsaye na lif ko lif
1. Mutumin da nauyinsa ya kai kilogiram 50 yana cikin lif. Saurin gudu saboda nauyi = 10 m/s2A tantance girman ƙarfin da benen lif ke yi wa mutumin idan:
(a) lif mai shiru
(b) lif ɗin yana motsawa ƙasa da gudu akai-akai
(c) lif ɗin yana motsawa sama da sauri na 5 m/s2
(d) lif ɗin yana motsawa ƙasa da hanzarin 5 m/s2
(e) lif ɗin faɗuwa kyauta
Misalai 2 na amfani da dokokin Newton a kan jirgin sama mai santsi (ba tare da gogayya ba)
1. Nauyin tubalin shine kilogiram 2, hanzarin nauyi saboda nauyi = 10 m/s2Kayyade (a) ƙarfin da ke haifar da hanzarta toshewar (b) girman saurin toshewar.
Tattaunawa
Misalai 2 na amfani da dokokin Newton ga jiragen sama masu karkata (akwai gogayya)
1. Nauyin tubalin shine kilogiram 2, hanzarin nauyi saboda nauyi = 10 m/s2, ma'aunin gogayya mai motsi da ta tsaye shine 0,2 da 0,1. Shin tonon yana nan ko yana motsi? Idan tonon yana motsi, ƙayyade (a) ƙarfin da ya haifar wanda ke hanzarta tonon (b) girma da alkiblar hanzarin tonon!
Tattaunawa
Dokar kiyaye yanayin layi ya bayyana cewa idan babu wani ƙarfi na waje da ke aiki akan abubuwa biyu da suka yi karo to lokacinta abin da ke gaban karo iri ɗaya ne da abin da ke faruwa bayan karo.
Bayani:
m1 = nauyin abu 1, m2 = nauyin abu 2
Kayan Karo Mai Rashin Lalacewa
A cikin wani karo na roba (karamin karo na roba mara kyau), dokar kiyaye karfin motsi tana aiki , yayin da dokar kiyaye kuzarin motsi ba ta aiki. A lokacin karo, wasu daga cikin kuzarin motsi ana canza su zuwa makamashin sauti, makamashin zafi, da makamashin ciki. Amfani da kalmar roba yana nuna cewa bayan karo, abubuwa biyu ba sa hadewa ko mannewa tare, amma maimakon haka suna tsalle. Misalin karo na roba mara kyau shine karo mai girma daya tsakanin marmara biyu ko kwallaye biyu na billiard.
Haɗari tsakanin abubuwa ana kiransa haɗari mai laushi idan ƙarfin motsi da kuzarin motsi na kowane abu kafin haɗari sun yi daidai da ƙarfin motsi da kuzarin motsi na kowane abu bayan haɗari. A wata ma'anar, a cikin haɗari mai laushi, dokar kiyaye ƙarfin motsi da dokar kiyaye kuzarin motsi suna aiki. Amfani da kalmar roba yana nuna cewa bayan haɗari, abubuwa biyu ba sa haɗuwa zuwa ɗaya ko kuma ba sa mannewa amma suna tsalle.
A cikin wani karo na roba (karamin karo na roba mara kyau), dokar kiyaye karfin motsi tana aiki , yayin da dokar kiyaye kuzarin motsi ba ta aiki. A lokacin karo, wasu daga cikin kuzarin motsi ana canza su zuwa makamashin sauti, makamashin zafi, da makamashin ciki. Amfani da kalmar roba yana nuna cewa bayan karo, abubuwa biyu ba sa hadewa ko mannewa tare, amma maimakon haka suna tsalle. Misalin karo na roba mara kyau shine karo mai girma daya tsakanin marmara biyu ko kwallaye biyu na billiard.
1. Nauyi (w)
Nauyi, ko kuma yawanci a takaice a matsayin nauyi, shine ƙarfin nauyi da ke aiki akan abu mai nauyi. Alamar nauyi ita ce w, wacce ke wakiltar nauyi.
Tsarin lissafin nauyi ya fito ne daga dabarar Dokar Newton ta biyu :
F = ma
Ana amfani da shi don ƙididdige nauyi:
w = mg
Keterangan :
F = ƙarfi (naúrar ƙasa da ƙasa = Newton)
w = nauyi (naúrar ƙasa da ƙasa = Newton)
m = nauyin abu (naúrorin ƙasa da ƙasa = kg)
a = ba hanzarta (naúrar ƙasa da ƙasa = m/s2)
g = hanzari saboda nauyi (raka'o'in ƙasa da ƙasa = m/s2)
1. Ma'anar salo
Ƙarfi wani abu ne da ke sa abubuwa su fuskanci hanzartaA wata ma'anar, ƙarfi wani abu ne da ke motsawa, tsayawa ko canza alkiblar motsi na wani abu.
Salo shine Adadin vector Saboda haka, ƙarfi yana da girma da alkibla. Alamar ƙarfi ita ce F (Ƙarfi). F ita ce alamar gabaɗaya ta ƙarfi. Akwai nau'ikan ƙarfi da yawa, kuma ba duk nau'ikan ƙarfi ke da alamar F ba. Naúrar ƙarfi ta duniya ita ce kg m/s.2 aka Newton.