7. Friction, Inclines, Systems

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?

For a sliding object moving across a horizontal surface, how does the kinetic friction force ($f{k}_{}$) depend on the object's speed ($v$)?

Which statement best explains why the coefficient of kinetic friction between two steel surfaces is relatively high because of steel's ductile nature?$\mu k_{}$

A block A with mass $m$ is pushed across a horizontal tabletop with a constant velocity by a horizontal force of magnitude $F$. What is the coefficient of kinetic friction between block A and the tabletop?

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.

A block of mass $m$ is sliding at constant velocity across a horizontal tabletop. If the applied force is $F$ and the normal force is $N$, what is the coefficient of kinetic friction ${\mu }_k$ between the block and the tabletop?

When an object slides across a surface, what is the relationship between $kinetic friction$ and the $thermal energy$ produced?

Which of the following lists correctly identifies the four main types of friction encountered in physics?

When a car tire is skidding on a road, how does increasing the speed of the tire affect the kinetic friction force between the tire and the road?

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