Mirayiridzo yekuedza kweStatic and Kinetic Friction
Musoro wekuyedza: Kukakavadzana kwakasimba uye kukakavadzana kwekinetic
Zvinangwa zvekuedza uku:
- Kuziva simba rekukweshana risingachinji
- Kuziva simba rekukweshana kwekinetic
Zvishandiso nezvinhu: Dynamometer, danda kecil.
Dzidziso huru:
Simba reKukakavadzana
Kukweshana isimba rinodzivisa rinobata pakati pezvinhu zviri kusangana. Munyaya iyi, kukweshana kwakadzidzwa kunoenderana nesimba rinobata pakati pezvinhu zviviri zvakasimba zviri kusangana.
Simba rekukweshana pachinhu chinofamba rinogara rakasiyana negwara rekufamba kwechinhu chacho.
Kune mhando mbiri dzekukakavadzana: kukanganisika kusingachinji (fs ) uye kukanganisika kusingachinji (f k ). Kukanganisika kusingachinji kunoshanda kana chinhu chichiri kufamba, ukuwo kukanganisika kunoshanda kana chinhu chichifamba. Kana ukasunda tafura asi ichiri kufamba, simba rekukakavadzana rinoshanda patafura isingachinji isimba rekukakavadzana. Kusiyana neizvi, kana tafura ichifamba, simba rekukakavadzana rinoshanda patafura isimba rekukakavadzana.
Simba Risingachinji reKukweshana
Kukweshana kwakasimba (Static friction) isimba rekukweshana rinobata zvinhu zvinenge zvakabatana kana zvinhu zvacho zvisiri kufamba.
fs = μs N
Mutemo wekutanga waNewton unoti chinhu chinomira kana simba rose (simba rinobuda) rakaenzana ne zero.
ΣF x = 0
F – f s = 0
F = fs
Kana chinhu chave kuda kufamba (chinhu chacho chichiri chakamira), simba guru rekukweshana rinogara rakafanana nesimba rekusunda kana kudhonza.
Kinetic Friction Force
Kinetic friction isimba rekukweshana rinobata pamusoro pezvinhu zvinenge zvakabatana kana zvinhu zvichifamba.
f k = μ k N
Mutemo wekutanga waNewton unoti chinhu chinofamba nekumhanya kusingachinji kana simba rose (simba rinobuda) rakaenzana ne zero.
F – f k = 0
F = f k
Kana chinhu chichifamba nekumhanya kwakafanana, hukuru hwesimba rekukweshana kwekinetic hwakafanana nehukuru hwesimba rekusunda kana kudhonza.
Matanho ekuyedza:
1. Isa bhokisi panzvimbo yakati sandara.
2. Batanidza dynamometer nebhuroko
3. Dhonza dynamometer kusvika bhuroko rava kuda kufamba.
4. Verenga hukuru hwesimba rinoratidzwa nedhinamometer, rinyore mukoramu yesimba rekukweshana kwesimba.
5. Dhonza dynamometer kusvika bhuroko rafamba nekumhanya kwakafanana.
6. Verenga hukuru hwesimba hunoratidzwa ne dynamometer, nyora mukoramu yesimba rekinetic friction.
7. Dzokorora kuedza katatu
Kuongorora Data neData:
-
Aihwa
Simba rekukweshana risingachinji ( fs )
Kinetic friction force (f k )
1
2
3
Avhareji
Pindura mibvunzo inotevera:
Ndechipi chikuru, static friction kana kinetic friction? Sei?
Mhedziso
Taura mhedziso yako.
