Q1. Friction depends on the of a surface. a. Smoothness b. Size c. Matter d. Color Q2. Sliding friction is than static friction. a. Greater b. Less c. Equal d. Depends Q3. Friction opposes the between two surfaces in contact. a. Refractive motion b. Motion c. Rotary motion d. Relative motion Q4. The frictional force exerted by fluids is also called a. Smug b. Slag c. Rung d. Drag Q5. Striking a matchstick produces fire by a. Friction b. Contact force c. Physical reaction d. Chemical reaction Q6. It is easier to hold an earthen pot than a steel pot as a/an a. Steel pot has more friction b. Earthen pot has less friction c. Earthen pot has more friction d. Steel pot is comparatively heavier Q7. The shape of fish is streamlined to a. Increase fluid friction b. Facilitate breathing c. Change the direction d. Decrease fluid friction Q8. In which of the following activities friction is useful? a. Heating of moving bodies b. Movement of machine c. Wearing and tearing of shoe sole d. Walking on ground Q9. Soapy water on floor would make it a. Difficult to walk b. More hygienic c. More clean d. Easier to walk Q10. Which of the following is characteristic of friction? a. It can change the direction of motion b. It is a non contact force c. It works on only resting body d. It works opposite to direction of motion Q11. The force required to keep the object moving with same speed is a measure of a. Contact friction b. Sliding friction c. Static friction d. Rolling friction Q12. It is difficult to walk of smooth surface due to a. Less friction b. More friction c. Without friction d. Absolute friction Q13. If an object started moving, it would never stop if a. There is moderate friction b. There is low friction c. There is high friction d. There is no friction Q14. A polished surface is a. Very slippery b. Entirely friction free c. Very rough d. Very high friction Q15. The frictional force on an object in a fluid depends on its a. Density of fluid b. Mass of object c. Color of fluid d. Speed of object Q16. All vehicles are designed to have shapes which a. Increase friction b. Reduce friction c. Neglect fluid friction d. Make fluid friction zero Q17. It is difficult to write on polished surface with pencil because a. Friction prevents the movement of pencil b. Polished surfaces have no friction c. Polished surfaces have less friction d. Polished surfaces have high friction Q18. Boat and ship have pointed tips to a. Increase the beauty b. Decrease friction due to liquid c. Increase friction due to liquid d. Make them more attractive Q19. When we attempt to move any surface, we apply a force to overcome a. Vander wall forces between surfaces b. Interlocking between surfaces c. Gravitational force d. Electrostatic forces between particles Q20. The sole of shoes becomes flat after using few months because of a. Wearing due to rough weather b. Wearing due to bad quality c. Wearing due to friction d. All of the above

Q1. Friction depends on the of a surface.

 

a. Smoothness

b. Size

c. Matter

d. Color

 

 

Q2.  Sliding friction is than static friction.

 

a. Greater

b. Less

c. Equal

d. Depends

 

Q3.  Friction opposes the between two surfaces in contact.

 

a. Refractive motion

b. Motion

c. Rotary motion

d. Relative motion

 

Q4. The frictional force exerted by fluids is also called

 

a. Smug

b. Slag

c. Rung

d. Drag

 

 

 

Q5. Striking a matchstick produces fire by

 

a. Friction

b. Contact force

c. Physical reaction

d. Chemical reaction

 

Q6. It is easier to hold an earthen pot than a steel pot as a/an

 

a. Steel pot has more friction

b. Earthen pot has less friction

c. Earthen pot has more friction

d. Steel pot is comparatively heavier

 

Q7. The shape of fish is streamlined to

 

a. Increase fluid friction

b. Facilitate breathing

c. Change the direction

d. Decrease fluid friction

 

Q8. In which of the following activities friction is useful?

 

a. Heating of moving bodies

b. Movement of machine

c. Wearing and tearing of shoe sole

d. Walking on ground

 

Q9. Soapy water on floor would make it

 

a. Difficult to walk

b. More hygienic

c. More clean

d. Easier to walk

 

Q10. Which of the following is characteristic of friction?

 

a. It can change the direction of motion

b. It is a non contact force

c. It works on only resting body

d. It works opposite to direction of motion

 

Q11. The force required to keep the object moving with same speed is a measure of

 

a. Contact friction

b. Sliding friction

c. Static friction

d. Rolling friction

 

Q12. It is difficult to walk of smooth surface due to

 

a. Less friction

b. More friction

c. Without friction

d. Absolute friction

 

Q13. If an object started moving, it would never stop if

 

a. There is moderate friction

b. There is low friction

c. There is high friction

d. There is no friction

Q14. A polished surface is

 

a. Very slippery

b. Entirely friction free

c. Very rough

d. Very high friction

 

Q15. The frictional force on an object in a fluid depends on its

 

a. Density of fluid

b. Mass of object

c. Color of fluid

d. Speed of object

 

 

Q16. All vehicles are designed to have shapes which

 

a. Increase friction

b. Reduce friction

c. Neglect fluid friction

d. Make fluid friction zero

 

Q17. It is difficult to write on polished surface with pencil because

 

a. Friction prevents the movement of pencil

b. Polished surfaces have no friction

c. Polished surfaces have less friction

d. Polished surfaces have high friction

Q18. Boat and ship have pointed tips to

 

a. Increase the beauty

b. Decrease friction due to liquid

c. Increase friction due to liquid

d. Make them more attractive

 

Q19. When we attempt to move any surface, we apply a force to overcome

 

a. Vander wall forces between surfaces

b. Interlocking between surfaces

c. Gravitational force

d. Electrostatic forces between particles

Q20. The sole of shoes becomes flat after using few months because of

 

a. Wearing due to rough weather

b. Wearing due to bad quality

c. Wearing due to friction

d. All of the above