differentiate between rolling and sliding friction
Answers
Rolling friction
= Rolling friction occurs when an object rolls on a surface.
= Rolling of the bodies over others actually reduces the friction.
= It is a force which attempts to stop the rolling motion by generating a reverse torque and so, rolling friction is a resistive force but not a type of friction.
= Rolling friction occurs due to deformation of surfaces.
Sliding friction
= Sliding friction occurs when two surfaces are rubbing against each other.
= Sliding of the body increases the friction. Hence sliding friction is always larger than rolling friction.
= Sliding friction occurs due to interlocking between microscopic "bumps" on surfaces.
= It acts as a back-haul external force along the contact area to stop the relative motion.
♥ The force resisting the motion of a rolling body on a surface is known as rolling friction .
E.g - Rolling of ball or wheel on the ground .
♥ Sliding friction is the restriction on the body’s movement as only one side of the body is in contact with the surface .
E.g - Pushing a box across the table .