Kinetic kukweshana simba

Kinetic friction isimba rekukweshana rinobata pamusoro pezvinhu zvinenge zvakabatana kana zvinhu zvichifamba.
Kana uchida kuona simba rekukweshana rinomira, shandisa equation 1.5 a. Kana uchida kuona kinetic friction coefficient, shandisa equation 1.5 b.
Mufananidzo wechipiri unoratidza chinhu chiri kudhonzwa nguva nenguva kuitira kuti chinhu chifambe nekumhanya kwakasimba. Pakufamba nekumhanya kwakasimba, hukuru hwe f_k zvakaenzana nehukuru hwesimba rinodhonza (F).

Mutemo wekutanga waNewton unoti chinhu chinofamba nekumhanya kusingachinji kana simba rose (simba rinobuda) rakaenzana ne zero.
Muenzaniso wematambudziko.
1. Bhokisi re 1 kg rakaiswa panzvimbo yakati sandara rinodhonzwa uchishandisa dynamometer kusvika bhokisi rafamba nekumhanya kwakafanana. Kana hukuru hwesimba rekudhonza hunoratidzwa ne dynamometer huri 1 Newton uye kukurumidza kunokonzerwa negiravhiti kuri 10 m/s², tsvaga: (a) hukuru hwesimba rekukweshana kwekinetic (b) chiyero chekukweshana kwekinetic
Kukurukurirana
Zvinozivikanwa :
Huremu hwebhuroko (m) = 1 kg
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²
Huremu hwebhuroko (w) = mg = (1 kg)(10 m/s²) = 10 kg m/s² = 10 Newton
Hukuru hwesimba rinodhonza (F) = 1 Newton
Jawab :
(a) f hombe_k
Kana bhuroko richifamba nguva dzose kana kufamba nekumhanya kusingachinji, hukuru hwe f hu_k = hukuru hwesimba rekudhonza (enzanisa equation 1.6)
Saka hukuru hwesimba rekukweshana kwekinetic (f)_k) = hukuru hwesimba rekudhonza (F) = 1 Newton
(b) Kukweshana kwekinetic

Referensi