What We Will Cover in the Chapter

Last updated at July 13, 2026 by

In this chapter we learn what a force is, what it can do, the two big families of forces (contact and non-contact), how we measure weight, and why some things float while others sink.

Understanding the Name of the Chapter

Exploring
Investigating through activities and everyday examples.
Forces
The pushes and pulls that act on objects.
What does the name of this chapter tell us?
  • The chapter is all about forces — pushes and pulls.
  • We explore what a force can do to an object.
  • We sort forces into contact and non-contact types.
  • We also measure weight and study floating and sinking.

Topics We Will Study in This Chapter

Topics We Will Study
Intro Introduction 5.1 What Is a Force? 5.2 What Can a Force Do to Objects? 5.3 Are Forces an Interaction Between Objects? 5.4 What Are the Different Types of Forces?
5.4.1 Contact forces (muscular, friction) 5.4.2 Non-contact forces (magnetic, electrostatic, gravity)
5.5 Weight and Its Measurement 5.6 Floating and Sinking
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