Kukweshana kwakasimba (Static friction) isimba rekukweshana rinobata zvinhu zvinenge zvakabatana kana zvinhu zvacho zvisiri kufamba.
Mufananidzo 1 unoratidza chinhu chakamira panzvimbo yakati sandara chiri kudhonzwa nesimba F. Kana chinhu chisiri kufamba saka f s idiki pane simba rekudhonza (F). Kana simba rekudhonza rikawedzerwa saka chinhu chinofamba. Kana chinhu chave kuda kufamba, hukuru hwe f s hwakaenzana nehukuru hwesimba rekudhonza (F).
Mutemo wekutanga waNewton unoti chinhu chinomira kana simba rinobuda kana simba rese rakaenzana ne zero.
Kana uchida kuona static friction coefficient, shandisa equation 1.1 b
Kana chinhu chacho chava kuda kufamba, hukuru hwacho simba guru rekukweshana rinomira zvakaenzana nehukuru hwesimba rekusunda kana kudhonza.
Muenzaniso wematambudziko.
1. Bhokisi re 1 kg rakaiswa panzvimbo yakati sandara rinodhonzwa uchishandisa dynamometer (chishandiso chekuyera simba). Kana bhokisi rava kuda kufamba, dynamometer inoverenga maNewton maviri. Kukurumidza kunokonzerwa negiravhiti = 10 m/s2Sarudza (a) hukuru hwesimba rekukweshana (b) chiyero chekukweshana
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
Simba rekudhonza (F) = 2 Newton
Jawab :
(a) Hukuru hwesimba rekukweshana rinomira (f)s)
Kana bhokisi rava kuda kufamba, hukuru hwesimba rekukweshana rinomira = hukuru hwesimba rekukweshana (enzanisa equation 1.4).
Saka simba rekukweshana rinomira (f)s) = simba rekudhonza (F) = 2 Newton
(b) Kukwana kwekukakavadzana kwakasimba
