Question

what is relationship among (a)magnitude of friction and the weight of the object (b) friction and nature of surface in contact with each other (c) friction and area of surface in contact with each other​

Answer 1

Answer:

Look the answer is I don't know the answer of (a) but

(b)If the surface is smooth then the object will slide over it if it is rough then it will roll hence either how much the surface is smooth it has pits and bumps in a rough condition there will be more friction as rough surfaces offer more friction.

(c)Rolling friction is less than sliding friction just because of surface area in contact as during sliding almost all of the surface of a body is in contact with the ground and rolling friction , take an example of a bicycle the tyre , its surface is in contact with the ground but actually it is less than in sliding friction down the tyre rolls and if there is low surface area in contact with ground then the object will roll if there is more like sliding a book on table there is more area in contact therefore the object will slide.

Explanation:

* Importance of area in contact with ground

* Rough surfaces offer more friction than smooth surfaces

* Sliding friction is always more than rolling friction.