0.1 List the causes of friction

What is the primary cause of friction between two surfaces?

• Surface roughness

• Temperature difference

• Elasticity

• Magnetic forces

Which factor contributes to the increase in friction when two surfaces are pressed together with greater force?

• Lubrication

• Normal force

• Velocity

• Inclination

When an object is sliding on a surface, what type of friction opposes its motion?

• Static friction

• Dynamic friction

• Rolling friction

• Fluid friction

What role does the nature of the materials in contact play in determining friction?

• It has no effect on friction

• It influences the type and magnitude of friction

• It decreases friction

• It only affects static friction

What is the term for the force required to initiate the motion of an object at rest?

• Kinetic friction

• Rolling friction

Which type of friction occurs when an object rolls over a surface?

• Static friction

• Dynamic friction

• Rolling friction

• Fluid friction

What effect does the application of a lubricant have on friction between two surfaces?

• Increases friction

• Has no effect on friction

• Decreases friction

• Converts static friction to dynamic friction

What is the relationship between temperature and friction in some materials?

• Higher temperature decreases friction

• Higher temperature increases friction

• Temperature has no effect on friction

• Friction causes temperature changes

What term is used for the resistance to motion experienced by an object submerged in a fluid?

• Dynamic friction

• Fluid friction

• Rolling friction

• Lubricated friction