Friction

In this topic, we will learn about the frictional force. It provides experiments and activities that explain the concept in a better way. It highlights the notion of sliding, static, and rolling friction. It also lists out factors affecting friction.

In this activity-based topic, we will learn about a type of frictional force called sliding friction with the help of pictures. It states that static friction comes into play when a body moves on the surface of another body.

In this topic, we observe another type of frictional force called static friction. It is explained with visual examples. We will learn that static friction comes into play when one body rests on the surface of another.

This topic discusses the advantages and disadvantages of friction. We cannot walk or sit without friction. Somewhere else, the friction causes harm like overheating and wearing out of moving parts in the machine.

This topic includes activities that illustrate how friction can be increased or reduced. Gymnasts put some substance in their hands to increase friction for better grip. It also mentions that powder can be added between two bodies to minimize friction.

This topic discusses rolling friction. It highlights the meaning of this friction. It also describes that it is caused when wheels deform the surface on which it rolls and conducts ground transportation.

This topic describes fluid friction. We know that air is light but yet, air exerts frictional force on objects moving through it. Similarly, water and other liquids exert force of friction when object moves through them.