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Grade 12th pass8 grade science

Define friction. Is it a contact force or non-contact force? Why do we rub our hands in winter ?

Profile image of Harshit Singh
5 Years agoGrade 12th pass
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Profile image of Pawan Prajapati
5 Years ago
Friction is the force which comes into play when one object moves on the surface of another. It is a contact force. When we rub our hands in winter heat is generated due to the force of friction. Therefore, we feel warm.