Answer:
Kinetic friction
Explanation:
When body is in rest then static friction force will act in opposite direction .Ans this force will given as follows
[tex]fr_s=\mu _{st}mg[/tex]
[tex]\mu _{st}\ is\ the\ coefficient\ of\ static\ friction[/tex]
When body is in motion then kinetic friction force will act in opposite direction .Ans this force will given as follows
[tex]fr_k=\mu _{k}mg[/tex]
[tex]\mu _{k}\ is\ the\ coefficient\ of\ kinetic\ friction[/tex]
When body rolls then rolling friction will act.
When body will slid then sliding friction will act.
