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Force and Pressure
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09/05/2021 11:24 am
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(i) Define friction.
(ii) Is it a contact force or non-contact force?
(iii) Why do we rub our hands in winter?
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09/05/2021 11:25 am
(i) Friction is the force which comes into play when one object moves on the surface of another.
(ii) It is a contact force.
(iii) When we rub our hands in winter heat is generated due to the force of friction. Therefore, we feel warm.