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Class 8 Science Chapter 12 Friction Quiz 5 (25 MCQs)

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1. The force of friction opposes the relative motion between two surfaces.
2. Fluid friction is also known as
3. How is motor oil a real-world application related to friction?
4. Only solids can produce friction
5. Smooth surfaces do not have any irregularities in them.
6. The frictional force of an object in a fluid depends upon its ..... with respect to the fluid.
7. Friction is
8. The rouugher the surface, the faster an object will travel over the surface
9. The object which will show most less air resistance
10. Who invented friction
11. What type of friction will you have when two objects slide against each other?
12. On which surface will a toy car travel the furthest?
13. The frictional force exerted by fluids is called-
14. How many types of frictions are there?
15. Friction helps you write on a paper or black board.
16. Force of friction depends on
17. Sliding friction is ..... than / to rolling friction
18. Movers slide a box down the ramp of a truck.What helps slow the box as it slides to the bottom of the ramp?
19. On rough surface friction is
20. What direction does friction act relative to motion?
21. Distance travelled in unit time is
22. The wheels and gears of a machine are greasedin order to decrease
23. How does increasing the weight of an object affect friction?
24. In a large commercial complex, there are four ways to reach the main road. One of the paths has loose soil, the second is laid with polished marble, the third is laid with bricks and the fourth has a gravel surface. It is raining heavily and Paheli wishes to reach the main road. The path on which she is least likely to slip is
25. Friction is the force that acts in the ..... direction of movement.
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