Friction flashcards
Learn about friction with these flashcards and quizzes covering key concepts and definitions.
Quiz(15 questions)
1. What type of friction prevents sliding when at rest?
Termes dans ce set(18)
What is friction?
Friction is the resistance to motion between two objects in contact.
Types of friction
1. Static 2. Kinetic 3. Rolling 4. Fluid
Static friction
The friction that prevents motion between stationary objects.
Kinetic friction
The friction acting between moving surfaces.
What affects friction?
1. Surface texture 2. Normal force 3. Material types
True or false: Friction always opposes motion.
True, because it resists the movement of surfaces.
Difference between static and kinetic friction
Static friction occurs before motion; kinetic friction occurs during motion.
Normal force
The perpendicular force exerted by a surface on an object in contact.
Coefficient of friction
A dimensionless number representing the frictional force between two surfaces.
Fill in the blank: F_friction = _____ x F_normal
μ (the coefficient of friction)
What is rolling friction?
Friction that occurs when an object rolls over a surface.
Which surface has more friction?
Rough surfaces generally have higher friction than smooth surfaces.
True or false: Friction can generate heat.
True, because moving surfaces convert kinetic energy into thermal energy.
Application of friction: brakes
Friction is used in brakes to slow down or stop vehicles.
What is fluid friction?
Resistance encountered by an object moving through a fluid (liquid or gas).
Difference in friction on hills
Friction increases as incline increases, affecting sliding down.
What is drag?
A form of fluid friction that opposes motion through a fluid.
Static vs Kinetic friction coefficients
Static friction coefficient is usually higher than kinetic friction.
Questions dans ce set(15)
1. What type of friction prevents sliding when at rest?
2. Which type of friction acts during movement?
3. Which surface condition leads to less friction?
4. True or false: All friction is negative work.
5. Which factor does NOT affect friction?
6. In which situation is static friction most relevant?
7. How does incline affect friction?
8. Which material would have the highest coefficient of friction?
9. What is the relationship between normal force and friction?
10. True or false: Rough surfaces ensure more sliding.
11. What happens when you apply a force greater than static friction?
12. Which of the following is a characteristic of fluid friction?
13. Fill in the blank: The formula for friction is F_friction = _____ x F_normal.
14. What type of friction do brakes rely on?
15. True or false: Friction only occurs between solid surfaces.
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