'O ka rule gula o nā mechanics.

ʻO ka wā kahiko, ka wā hoʻohana hemahema hoi maomeka (aeie une lōhai puka, a pela aku.), A nani hiʻona o kēia mau machines i ua loaʻa. Ua'ike'ia'o nā hana a pau i nā hana ma'alahi kahi i pili pū me nā mea i hana'ia e ka mīkini. Pono e ho'omaopopo'ia,'o ka lakio o nā ho'oikaika o nā hopena'elua o kekahi māmā māmā kahi e ho'ohana'ia ai nā pū'ali, he manawa like'ole ia o ka lakene o nā pū'ali e ho'ohana'ia ana i kēia mau hopena.

'O ka ikaika e pili ana i ka lima'ākau o ka leve, he mau manawa ia ma lalo o ka ikaika e hana ai ma ka'ao'ao hema. No laila,'o ka ho'okahuli'ana o ka lima'ākau (s2) he mau manawa nui ia ma mua o ka ho'one'e'ana o ka lima hema (s1).

Ina paha, no ka mālama pono'ana i ka pale o ka lever,'o ka ikaika F2 he mea ia o ka mea li'ili'i ma mua o ka ikaika F1. I kēia manawa, i ka wā e ho'omaka ai ka leve, e lilo ka hopena s2 o ka hopena hope i nā manawa i'oi aku ka nui ma mua o ka ne'e'ana o ka hopena o ka hopena mua. Inā pālua ka pahu, a laila no ka mea ho'okahi ka pilina ma waena o nā mea i ho'ohana'ia i nā kaula i ho'one'e'ia ma nā pahu'elua a mālama'ia ia i kahi o ke kaulike ke kūpono, a ua pau nā mahele o ke kaula i ka wā e ho'ololi ai ka poho. Ma muli o ka nui o kēia mea i hiki'ole ke ho'ohālikelike'ia, ua kapa'ia he nani loa:'o ia ka "'oihana gula o nā mechanics".

Ma ka ho'ohana'ana i ka notation i ho'okomo'ia, hiki ke hō'ike'ia ke kānāwai gula o nā mechanics e ke kumuhana penei:

S1 / s2 = F2 / F1

A i'ole S1 * F1 = s2 * F2.

Ma hope iho, ua ho'onui iki'ia ke'ano o nā ho'ololi a me ke'ano o nā mīkini i ho'ohana'ia i nā mechanics. Ua ho'ololi'ia'o ka mana gula o nā mechanics'a'ole e pili mau i ke'ano ma'alahi. Naʻe, ka wā e lilo paʻakikī i ka mīkini ano a me keia ano o ka neʻe 'ana, nā hana a me ka manaʻo pohihihi o ke gula rula o mechanics. No laila, ma lalo o kāna a'o'ana, ua lilo i mau mea pa'akikī. Pono e ho'omaopopo'ia ua lilo ka mana gula o nā mechanics i kumu no ka puka'ana o nā mana'o like'ole e pili ana i ka ikehu a me ka hana. Ma keia hihia, i ka noho aliʻi o ka mea mua, ka mea simplest hoʻomanaʻo o ke kānāwai o ka mālama o ka ikehu, ke mau pilina i nā mea a pau maoliʻike manaʻo.

'O ka ho'ohana'ana o ka "kāhui gula"

E mau ana kēia kulekele i ka manawa wale no i ka hana kaulike o nā mīkini pa'akiki (ai'ole i nā wikiwiki li'ili'i). Eia kekahi la'ana, i ka wā e pihi ai ka pāpālua, e ne'e nā wēlau o nā kaula i nā mamao s1 a me s2, i'eha'ia ma nā poho o ka radii r1 a me ka 2, a me nā mea'ē a'e, ua ho'opa'a'ia. Kūlike kēia mau mamao i ka radii r1 / r2 = s1 / s2.

No laila, no ke kānāwai gula e pili pono i kahi pāpālua, pono e ho'okō'ia nā kumu kūikawā nei: F1 / F2 = r2 / r1.

I kēia hihia, e ho'ohālikelike nā pū'ali F1 a me F2. No laila, i ka mīkini e hana, a me ka ʻaʻahu noi, a noho ma koena. Eia na'e, no ka holo'ana i'elua'āpana, pono e ho'onā i ka palekana. No ka hana'ana i kēia, pono mākou e ho'ohui i kekahi mea ikaika i kekahi ikaika, e'ōlelo, F1. E ho'onui'ia ka ne'e'ana i ke kino.

Nā kālā āpau āpau

'O ka kālā kālā o ke aupuni he mea kālā i hā'awi'ia e kahi kīpila o kahi po'e a i'ole he moku no ka mea e ho'ohana'ia ai ma ka'āina o kēlā moku a ma waho paha. Ho'ohana'ia ia ma ka ho'okele waiwai kālā o ka honua, a ma nā wahi'ē a'e, e pili ana i nā helu kālā.

E'ākoakoa mai ana mai ke kū'ai aku i kālā

'O ka nīnau o ka ho'okomo'ana i kahi uku no kekahi'ano hana e like me ke kū'ai'ana i ke kālā kālā, ma muli o ka hopena e kū nei i loko o kekahi hui, hiki ke ho'ohālikelike'ia me nā koho'ana i ka mana ki'eki'e loa a me ka ho'omaka'ana o ka hana a ka pā'ani hou i koho hou'ia. Ma muli o ka nui o nā mana'o kuhi o nā mea akamai i kēia hana hou, ua koi'ia ka National Bank e hana pono i nā hana'ike'ike i waena o ka heluna o ka moku'āina. No laila, e hiki iā ia ke ho'ākāka i nā kānaka i kekahi mau rula a me nā mana'o e pili ana i kēlā me kēia mema o ka hui kaiaulu.