## Friction-MCQ-Basic

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Friction. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. When a body is moving on a surface, the force of friction is called

•  Static friction
•  Dynamic friction
•  Limiting friction
•  Rolling friction

Dynamic friction

Q2. Which one of the following is not used to reduce friction

•  Oil
•  Ball bearings
•  Sand
•  Graphite

Sand

Q3. A block of mass 10 kg is placed on an inclined plane. When the angle of inclination is 30o, the block just begins to slide down the plane. The force of static friction is

•  10 kg wt
•  89 kg wt
•  49 kg wt
•  5 kg wt

5 kg wt

Q4. A box is lying on an inclined plane what is the coefficient of static friction if the box starts sliding when an angle of inclination is 60 o

•  1.173
•  1.732
•  2.732
•  1.677

1.732

Q5. A brick of mass 2 kg begins to slide down on a plane inclined at an angle of 45o with the horizontal. The force of friction will be

•  19.6 sin 45o
•  19.6 cos 45o
•  9.8 sin 45o
•  9.8 cos 45o

19.6 sin 45o

Q6. To avoid slipping while walking on ice, one should take smaller steps because of the

•  Friction of ice is large
•  Larger normal reaction
•  Friction of ice is small
•  Smaller normal reaction

Friction of ice is small

Q7. Brakes of very small contact area are not used although friction is independent of area, because friction

•  Resists motion
•  Causes wear and tear
•  Depends upon the nature of materials
•  Operating in this case is sliding friction

Causes wear and tear

Q8. What happens to the coefficient of friction, when the normal reaction is halved

•  Halved
•  Doubled
•  No change
•  Depends on the nature of the surface

No change

Q9. A force of 98 Newton is required to drag a body of mass 100 kg on ice. The coefficient of friction will be

•   0.98
•  0.89
•  0.49
•  0.1

0.1

Q10. A 60 kg body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficients of static and sliding friction are 0.5 and 0.4 respectively. The acceleration of the body is

•  6 m/s2
•  4.9 m/s2
•  3.92 m/s2
•  1 m/s2

1 m/s2

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