Question

Science.. Chapter- Friction..
Intext questions..
please tell me answers of these questions.. I request to all people...☺​

Answer 1

1 is the force that oppose the motion

2 is motion

3 is static ,rolling and sliding friction

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Answer 2

Answer:

1. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
2. Friction opposes the motion between the surfaces in contact with each other.
3. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces.
4. There are ample of factors affecting friction. Some of them which are in my mind are listed below:
6. 1. Nature of the surfaces in contact like hard or smooth. To understand this properly, you can perform one activity which I am going to tell you i.e:-
8. Make an inclined plane using a cardboard supported with bricks. Mark a point A on any part of that cardboard. Let a pencil cell move down through this point. Now, spread a piece of cloth on the cardboard and repeat the same activity. After this you will observe that the pencil cell covered larger distance when moved on a cardboard as compared to piece of cloth.
10. 2. How hard the two surfaces are compressed together. For example: If we are pushing a massive box which is at rest. There will be no doubt more interlocking of the molecular substances between two surfaces and henceby, we would apply more static friction in order to move that box. Now, if we would try to move a light box, there will be less interlocking of the molecules between two surfaces and henceforth, we would apply less static friction to move that box.