A) घर्षण बल सापेक्ष गतीला विरोध करते.
B) स्थितिक घर्षणाची मर्यादित मूल्य सामान्य प्रतिक्रियेच्या समप्रमाणात असते.
C) लोटण घर्षण सरकण घर्षणापेक्षा कमी असते.
D) सरकण घर्षणाच्या गुणांकाची परिमाणे लांबीची असतात.
योग्य उत्तर: D
सरकण घर्षणाच्या गुणांकाला कोणतेही परिमाण नसते. $ f={\mu_s}N $
$ \Rightarrow {\mu_s}=\frac{f}{N} $
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