Ajụjụ atọ gbasara usoro nhazi oge opupu ihe ubi
1. Mmiri dị n'ime nkwusioru efu nwere ogologo sentimita iri. N'akụkụ efu, a na-akwụsịtụ ibu gram 200 ka ogologo mmiri ahụ wee bụrụ sentimita iri na otu. Ọ bụrụ na g = 10 m/s 2 , kedu ihe bụ ike mmiri na-agbanwe agbanwe?
Mara:
Ogologo mbụ nke oge opupu ihe ubi (y 1 ) = 10 cm = 0.10 m
Ogologo ikpeazụ nke oge opupu ihe ubi (y 2 ) = 11 cm = 0.11 m
Mgbanwe ogologo oge opupu ihe ubi (Δy) = 0.11 – 0.10 = 0.01 mita
Ibu ibu (m) = gram 200 = 0.2 kg
Ibu ibu (w) = mg = (0,2)(10) = Newtons 2
Achọrọ: Oge opupu ihe ubi (k)
ngwọta:
Usoro oge opupu ihe ubi na-agbanwe agbanwe:
F = k Δy
k = F / Δy = 2 / 0,01 = 200 / 1 = 200 Newtons/mita
2. Enwere ike ịgbatị isi iyi ka o wee gbasaa site na 10 cm ma nwee ike nke 0.5 Joule. Gịnị bụ isi iyi?
Mara:
Mgbakwunye nke ogologo oge opupu ihe ubi (Δy) = 10 cm = 0.1 mita
Ike ike nke oge opupu ihe ubi (EP) = 0.5 Joules
Achọrọ: Oge opupu ihe ubi (k)
ngwọta:
A na-agbakọ ihe na-agbanwe agbanwe nke oge opupu ihe ubi site na iji usoro ike ike nke oge opupu ihe ubi:
EP = ½ k Δy 2
2 EP = k Δy 2
2 (0,5) = k (0,1) 2
1 = k (0,01)
k = 1 / 0,01 = 100 / 1 = 100 Newtons/mita
3. Mmiri e dọtara nke nwere ike nke 100 N na-eme ka ogologo ya dịkwuo sentimita ise. Gbakọọ ihe na-agbanweghi agbanwe nke mmiri ahụ.
Mara:
Ike (F) = 100 N
Mmụba n'ogologo oge opupu ihe ubi (Δx) = 5 cm = 0.05 m
Achọrọ: Oge opupu ihe ubi (k)
ngwọta:
F = k Δx
k = F / Δx = 100 / 0,05 = 10.000 / 5 = 2000 Newtons/mita
