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Class 8 Science Practice Test: Friction
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Class 8 Science Practice Test: Friction
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25 Questions

1. Lubricant
2. To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
3. What is the most common way to reduce friction?
4. Why is it harder to move a heavy box at rest across the floor than to keep it sliding?
5. The maximum value of static friction that comes into play when a body is just at the point of sliding over the surface of another body is called
6. A toy car released with the same initial speed will travel farthest on
7. Which of the following is not a smooth surface?
8. Friction is a
9. Which of the following produces least friction?
10. Force of friction depends on
11. Burning of meteor in the atmosphere is due to
12. Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
13. The shape of an aeroplane is like a
14. Which of the following surfaces will offer the least friction?
15. Friction is
16. Which of the following are fluids?
17. Friction due to fluids is called
18. When the two surfaces in contact have a very thin layer of lubricant between them, it is known as
19. Least amount of friction is required in which of the following sports?
20. If we apply oil on door hinges, the friction will
21. Friction always
22. Mobil oil is used in scooters and bikes for which purpose?
23. The force of friction acts in a direction to the direction of motion of the object.
24. Friction can be reduced by
25. Fluids are

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