Moving Things, People, and Ideas

This chapter covers the concept of force and pressure. It explains the different types of forces and the effect of force. It helps us understand the resultant or net force acting on a body. It also discusses the pressure exerted by liquids.

This chapter discusses the concept of friction. Here, we will go through a detailed study of the causes of friction and what happens if friction does exist. We will discuss a few instances where we can observe friction in daily life.

This chapter discusses the phenomenon of sound. Here, we will understand how sound is produced, sound waves, characteristics of sound, etc. We will also learn about the propagation and speed of sound and sounds produced by humans.