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tbn032
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In pure rolling the of the sphere contact points of the sphere are at zero velocity,how is friction opposite to the motion of sphere being applied to these points?how the frictional force f is bieng applied to the sphere?
Technically it's called rolling resistance. Friction applies if the sphere is accelerating or sliding.tbn032 said:can you please explain what exactly is rolling friction?
Do you have a definition in mind for "rolling static friction". I do not know what you mean by that phrase.Lnewqban said:Rolling static friction
I see it as the instantaneous non-slipping contact of a rolling body against another surface, flat or not, when a torque is present.jbriggs444 said:Do you have a definition in mind for "rolling static friction". I do not know what you mean by that phrase.
Certainly there can be static friction between an unmoving wheel and the ground upon which it rests.
Rolling friction is a type of friction that occurs when an object rolls over a surface. It is caused by the deformation of the object and the surface, and the energy lost in this process is known as rolling resistance.
Rolling friction is different from other types of friction because it involves the movement of an object over a surface, rather than the sliding or rubbing of two surfaces against each other. This type of friction is typically lower than other types of friction, such as static or kinetic friction.
The amount of rolling friction is affected by several factors, including the weight and shape of the object, the type of surface it is rolling on, and the speed at which it is rolling. The type of material the object and surface are made of can also impact rolling friction.
Rolling friction is typically measured using a device called a tribometer, which applies a known force to an object and measures the resistance as it rolls over a surface. The coefficient of rolling friction, which is the ratio of the force applied to the force of the object's weight, is used to quantify the amount of rolling friction.
There are several ways to reduce rolling friction, including using smoother surfaces, reducing the weight of the object, and using lubricants or ball bearings. Additionally, increasing the speed of the rolling object can also decrease the amount of rolling friction.