Why do a sphere rolling without slipping on a horizontal plane will suffer no friction.
What are the values of kinetic friction and static friction in this situation?
Answers
Explanation:
1. Upton, an ideal rolling sphere is in contact at only one point of the plane it is rolling on. At this point, there is no force pulling the sphere forward so there is no friction opposing the motion. In a case of slipping the point in contact moves along the surface and hence there is friction opposing the motion.
2.The coefficient of kinetic friction is the ratio F/w or mg/Mg , or simply m/M. Based on the data you enter, if the ratio m/M is exactly equal to the selected μ, no motion will occur.
Answer:
A sphere can move by rolling and by sliding. An example might be back spin applied to the cue ball when playing snooker/pool. The ball moves acroos the table but it is not rolling. IN other circumstances it can roll.
The question refer to a horizontal plane not a tble. A plane is perfectly flat and a sphere is a perfect sphere. A rolling sphere does not slide, the surface comes down from a bove and rests on the plane. At the back of the sphere, the surface moves up away from the plane.
To have friction, you need to have a component of a force which is parallel to the plane. This doesnt exist so there is no friction.
Real spheres and real surfaces are not perfect spheres/ perfectly flat so there is some rolling friction.