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Factors Affecting Friction

Question 8In ...

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Question 8
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

(a) Granite surface
(b) polished marble
(c) Tile floor
(d) gravel

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Solution

(d) gravel

She should use the gravel surface path which provides sufficient friction force to walk. Soft and wet sand greatly increases the amount of effort as we sink into them. Gravel on top of mud stops us sinking deeper. And that makes walking easier.

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Similar questions

Q. Question 8
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

(a) Granite surface
(b) polished marble
(c) Tile floor
(d) gravel

Q. In a large commercial complex there are four ways to reach the main road. One of the path has loose soil, the second is laid with polished marble, the third is laid with bricks and the fourth has 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:

Q. Question 4
A toy car released with the same initial speed will travel farthest on

(a) muddy surface
(b) polished marble surface
(c) cemented surface
(d) brick surface

Question 1

A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile

(a) Is a better conductor of heat than the wooden tile.

(b) Is polished while wooden tile is not polished.

(c) Reflects more heat than wooden tile.

(d) Is a poor conductor of heat than the wooden tile.

Q. There is a prism with refractive index equal to

\sqrt{2}

and the refracting angle to

30^{o}

. One of the refracting surface of the prism is polished. A beam of monochromatic light will retrace its path if its angle of incidence over the first refracting surface of the prism is:-

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Factors Affecting Friction

Standard VIII Physics

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