Friction Quiz

Friction Quiz

Quiz

  

 

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