Roll a piece of marble on three different surfaces spread out on floor — taut cellophane sheet, carpet and newspaper and measure the distance covered by the marble. Observe the result and answer the following questions. b)is there any difference in the distance covered by the marble? give reason.
Answers
Answer:
The correct answer is Cellophane sheet, Newspaper, Carpet.
Concept:
Friction: Friction opposes the relative motion between two surfaces in contact. It acts on both the surfaces.
Friction depends on the nature of surfaces in contact.
For a given pair of surfaces, friction depends upon the state of the smoothness of those surfaces.
This means if the surface is more smooth then the friction over there is very less.
Friction depends on how hard the two surfaces pressed together.
Static friction comes into play when we try to move an object at rest.
Sliding friction comes into play when an object is sliding over another. Sliding friction is smaller than static friction.
Friction can be increased by making a surface rough.
Explanation:
Cellophane is a plastic sheet with a high degree of smoothness so very less friction over there.
A newspaper on a microscopic level has little roughness with respect to cellophane.
Carpet on the other hand has more roughness and creates more friction.
The increasing order of roughness is Carpet > Newspaper > Cellophane
⇒ Friction in increasing order (Cellophane < Newspaper < Carpet)
Answer:
yes their will be a different in each of them
Explanation:
It will cover most distance by rolling it on a taut cellophane sheet as it is smooth and thus have less friction whereas carpet have more friction beacuse of its non slip surface and on a newspaper it will cover a distance more than of on the carpet and less than of on taut cellophane sheet but it will make a nice distance as it is also smooth and will have less friction
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