what is difference in rolling and pure rolling and which type of friction can be taken in both rolling and pure rolling.
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Rolling friction because rolling friction comes into play when the surface of an object act on another object
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When external force with no torque acts on the rolling object‐surface system, there will be a tangential force at the point of contact between the surface and rolling object that provides the required torque as long as the motion is pure rolling; this force is usually static friction.
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