Direction OF friction in rolling motion

Examples on rotation & rolling||Friction in rolling motion||Concept OF β||Examples on concept OF β

Out of sliding friction, static friction and rolling friction : Which one is the smallest ?

if mu_(s),mu_(k) and mu_(r) are coefficeints of static friction, sliding friction and rolling friction, then.

A uniform solid disk rolling down an incline making angle theta with the horizontal. The minimum coefficient of friction required to maintain pure rolling motion for the disk is.

Explain the origin of (i) sliding friction (ii) the rolling friction .

Rolling friction is:

A solid sphere is thrown up a rough incline. The sphere rolls up without slipping and eventually comes down rolling without slipping. The direction of friction during upward and downward motion respectively is :-

Define : a. static friction b. dynamic friction c. rolling friction d. limiting friction

Obtain expression for K.E. of rolling motion.