Friction, Class 11 Physics NCERT Solutions

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Frictional force always acts opposite to the motion

 True

 False

 Can’t predict

 None of the above

Question 1 of 10

2. After the body starts moving, the friction involved with motion is

 Static Friction

 Rolling Friction

 Sliding friction

 Kinetic Friction

Question 2 of 10

3. Impending motion of a body is opposed by

 sliding friction

 rolling friction

 static friction

  kinetic friction

Question 3 of 10

4. A block of mass 1kg is placed on the floor. The coefficient of static friction is 0.2. If a force of 1N is applied to the block, the force of friction is

 0

 2N

 1N

  varies with the area of contact of the block

Question 4 of 10

5. A particle moves in a circle with a constant speed of 6m /s. Its centripetal acceleration is 120 m/s², The radius of the circle is

 20 cm

 200 cm

 300 cm

 30 cm

Question 5 of 10

6. A body rests on an inclined plane and the angle of inclination is varied till the body just begins to slide down. The coefficient of friction is . What is the angle of inclination?

 45°

 60°

 15°

 30°

Question 6 of 10

7. A block of mass 2kg rests on a plane inclined at an angle of 30o with the horizontal. The coefficient of friction between the block and the surface is 0.7. The frictional force acting on the block is

 10 N

 11.9 N

 12.5 N

 11 N

Question 7 of 10

8. A particle moves in a circle of radius 0.30m with a constant speed of 6m/s. Its centripetal acceleration is

  20 m/s²

 zero

 12 m/s²

 120 m/s²

Question 8 of 10

9. When a wheel rolls on a level road, the direction of frictional force at the point of contact of wheel and ground is

 along the tangent to the wheel

 forward direction

 along the centre of the wheel

 backward direction

Question 9 of 10

10. A force of 20 N is applied on a body of mass 4 kg kept on a rough surface having coefficient of friction 0.1. Find acceleration of body. Take g = 10 m/s²

 7 m/s²

 4 m/s²

 9 m/s²

 6 m/s²

Question 10 of 10

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