Which type of friction resists the motion of an object that is already moving along a surface?

A mug of mass $m$ rests on a horizontal table. If a horizontal force is applied and the mug moves at constant velocity, what is the magnitude of the frictional force exerted on the mug?

When tightening a head bolt, approximately what percentage of the applied turning torque is typically lost to kinetic friction rather than used to actually stretch the bolt?

Which of the following material pairings would most likely result in the greatest kinetic friction ($f\_k$) when sliding against each other?

Which of the following scenarios best demonstrates kinetic friction?

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box

While driving on a slippery highway, which action is most effective in reducing the risk of skidding due to kinetic friction between the tires and the road ($f\_k$)?

Three identical crates are pushed across different surfaces: crate A on ice, crate B on wood, and crate C on concrete. If the normal force is the same for all, rank the crates from least to greatest kinetic frictional force acting on them.