Which is true for rolling friction `( mu _(r ) ) `, static friction `( mu_(s))` and kinetic friction `( mu_(k))` ?

Define static friction and kinetic friction.

For a given mass rolling friction is how many times static friction and kinetic friction

Rolling friction, static friction, sliding fricition.

A block of mass M is sliding down the plane. Coefficient of static friction is mu_(s) and kinetic friction is mu_(k) . Then friction force acting on the block is :

A box of mass 200 kg is kept on a rough horizontal floor having coefficient of static friction mu_(s)=0.25 and coefficient kinetic friction mu_(k)=0.2. Find the work done by a man to slide the body slowly through 20 m with a minimum force. Also find the magnitude of the minimum force.

Arrange coefficient of limitin friction (mu_1) ,coefficient of kinetic friction (mu_k) and coefficient of rolling ffriction (mu_r) in scending order.

If mu_(s ) is coefficient of static friction and mu_(k) is coefficent of kinetic friction then