Friction
Physics questions about the force of friction, its types, and properties
Questions
Question 1 Multiple Choice (Single Answer)
What prevents a car wheel from slipping as it rolls on the ground?
- Static friction
- Kinetic friction
- Coefficient of static friction
- Coefficient of kinetic friction
- Sliding friction
Question 2 Multiple Choice (Single Answer)
Which of the following statements is incorrect about friction?
- It is a force that is created whenever two surfaces move or try to move across each other.
- It always opposes the motion or attempted motion of one surface across another surface.
- It is dependant on the texture of both surfaces.
- It is dependant on the amount of contact force pushing the two surfaces together (normal force).
- It increases with the smoothness of surfaces.
Question 3 Multiple Choice (Single Answer)
Which of the following is not used to decrease the force of friction?
- Ball bearings
- Air cushions
- A treaded tyre
- Grease
- Water
Question 4 Multiple Choice (Single Answer)
According to the law of conservation of energy, what happens to the energy due to friction?
- It decreases.
- It increases.
- It is lost.
- It remains as it is.
- It is transformed into heat.
Question 5 Multiple Choice (Single Answer)
The skin friction between air and airplane is an example of __________________________.
- kinetic friction
- static friction
- sliding friction
- fluid friction
- frictionless motion