Friction Quiz

Friction Quiz

Quiz

  

1 / 20

1. Which surface combination typically produces the highest friction?
   1.   Wood on wood
   2.   Metal on metal
   3.   Plastic on ice
   4.   Rubber on glass
2. What is the relationship between the weight of an object and the friction it experiences?
   1.   Friction is inversely proportional to weight.
   2.   Friction is independent of weight.
   3.   Friction increases with weight.
   4.   Friction decreases with weight.
3. Which type of friction opposes the initial motion of an object at rest?
   1.   Kinetic friction
   2.   Rolling friction
   3.   Static friction
   4.   Fluid friction
4. Which statement best describes lubricants' effect on friction?
   1.   Lubricants change friction into a repulsive force.
   2.   Lubricants have no effect on friction.
   3.   Lubricants increase friction.
   4.   Lubricants decrease friction.
5. What happens to the force of friction when an object slides at a constant velocity?
   1.   Friction increases.
   2.   Friction remains constant.
   3.   Friction becomes repulsive.
   4.   Friction decreases.
6. Which type of friction is involved when a parachute opens, slowing the descent of a skydiver?
   1.   Static friction
   2.   Rolling friction
   3.   Kinetic friction
   4.   Air resistance
7. What is the angle at which an object on an inclined plane will start to slide called?
   1.   Angle of incline
   2.   Angle of friction
   3.   Angle of repose
   4.   Angle of incidence
8. Which of the following factors affect friction?
   1.   All of the above
   2.   Mass of the objects
   3.   Surface area in contact
   4.   Surface texture
9. When does friction increase?
   1.   When the surfaces are rough
   2.   When the surfaces are wet
   3.   When the surfaces are smooth
   4.   When the surfaces are lubricated
10. Which of the following objects would experience the least amount of friction when sliding?
    1.   A smooth metal block on a rough concrete surface
    2.   A smooth metal block on a smooth metal surface
    3.   A rough wooden block on a rough wooden surface
    4.   A rough wooden block on a smooth metal surface
11. Which type of friction occurs between a rolling object and the surface it rolls on?
    1.   Static friction
    2.   Fluid friction
    3.   Rolling friction
    4.   Kinetic friction
12. What is friction?
    1.   The force that repels objects away from each other
    2.   The force that opposes the motion of objects
    3.   The force that causes objects to move faster
    4.   The force that attracts objects to each other
13. Which factor does not affect the force of friction between two surfaces?
    1.   Mass of the objects
    2.   Surface area in contact
    3.   Temperature
    4.   Coefficient of friction
14. What is the SI unit of friction?
    1.   Newton-meter (Nm)
    2.   Newton (N)
    3.   Meter per second (m/s)
    4.   Joule (J)
15. Which statement is true regarding the coefficient of friction?
    1.   It is always constant for a given pair of surfaces.
    2.   It varies depending on the materials in contact.
    3.   It is a scalar quantity.
    4.   It depends only on the mass of the object.
16. Which type of friction is typically the easiest to overcome?
    1.   Fluid friction
    2.   Kinetic friction
    3.   Static friction
    4.   Rolling friction
17. Which type of friction is involved when a boat moves through water?
    1.   Kinetic friction
    2.   Rolling friction
    3.   Static friction
    4.   Fluid friction
18. Why do cars have grooves in their tires?
    1.   To increase friction
    2.   To reduce friction
    3.   To enhance fuel efficiency
    4.   To improve aesthetics
19. Which factor affects the coefficient of friction between two surfaces?
    1.   Velocity
    2.   Pressure
    3.   Temperature
    4.   All of the above
20. In which situation is friction desirable?
    1.   Walking on a dry pavement
    2.   Ice skating on an icy surface
    3.   Slipping on a wet floor
    4.   Sliding down a snowy hill