1. E gosiri eserese nke ike (F) megide ogologo (x ) n'elu eserese dị n'okpuru. Chọta ihe na-agbanweghi agbanwe nke oge opupu ihe ubi!
ngwọta
k = F / x
F = ike (Newton)
k = ihe na-agbanweghi agbanwe (Newton/mita)
x = mgbanwe n'ogologo (mita)
Oge opupu ihe ubi na-agbanwe agbanwe:
k = 10 / 0.02 = 20 / 0.04
k = 500 N/m
[irp]
2. Chọpụta ihe na-agbanwe agbanwe nke oge opupu ihe ubi.
ngwọta
Oge opupu ihe ubi na-agbanwe agbanwe:
k = F / x
k = 5 / 0.01 = 10 / 0.02 = 15 / 0.03 = 20 / 0.04
k = 500 N/m
[irp]
3. Oge opupu ihe ubi A nwere ogologo mbụ ya bụ 60 cm, ebe oge opupu ihe ubi B nwere ogologo mbụ ya bụ 90 cm. Oge opupu ihe ubi A nwere ogologo mgbe niile 100 N/m, oge opupu ihe ubi B nwere ogologo mgbe niile 200 N/m. Oke mgbanwe na ogologo oge oge opupu ihe ubi A na mgbanwe na ogologo oge oge opupu ihe ubi B bụ…
A maara:
Ọnụọgụ oge opupu ihe ubi A (k A ) = 100 N/m
Ọnụọgụ nke oge opupu ihe ubi B (kB ) = 200 N/m
Ike na mmiri A (F A ) = F
Ike na mmiri B (F B ) = F
Achọrọ: Δl A : Δl B
Ngwọta:
Usoro iwu Hooke:
Δl = F / k
Δl = mgbanwe n'ogologo, F = ike, k = ihe na-agbanweghi agbanwe
Mgbanwe n'ogologo oge opupu ihe ubi A:
Δl A = F A / k A = F / 100
Mgbanwe n'ogologo oge opupu ihe ubi B:
Δl B = F B / k B = F / 200
Oke mgbanwe n'ogologo oge opupu ihe ubi A na mgbanwe n'ogologo oge opupu ihe ubi B:
Δl A : Δl B
F/100: F/200
1 / 100: 1 / 200
1 / 1: 1 / 2
2: 1
[irp]
4. A na-eji ike nke 10 N dọpụta eriri naịlọn nke nwere ogologo mbụ ya bụ 20 cm. Mgbanwe n'ogologo eriri ahụ bụ 2 cm. Chọpụta oke ike ahụ ma ọ bụrụ na mgbanwe n'ogologo ya bụ 6 cm.
A maara:
Ike (F) = 10 N
Mgbanwe n'ogologo ( Δl ) = 2 cm = 0.02 m
Achọrọ: oke ike (F) ma ọ bụrụ na Δl = 0.06 m.
Ngwọta:
Na-adịgide adịgide:
k = F / Δl
k = 10 / 0.02 = 500 N/m
Oke ike (F) ma ọ bụrụ na Δl = 0.06 m:
F = kx
F = (500)(0.06)
F = 30N
[irp]
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