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Ch 18: Force, Rotation, Pressure & Density

About This Chapter

Use the engaging lessons in this chapter to raise your understanding of force, rotation, pressure, and density. Lessons include Newton's Second Law of Motion and Hooke's Law. If you are preparing for an exam, these lessons and quizzes can help by testing your knowledge of the topics covered.

Force, Rotation, Pressure & Density - Chapter Summary

These lessons on force, rotation, pressure, and density include a discussion of the principle of moments. You can also gain a clearer understanding of how a simple machine operates. By the end of the chapter, you should be positioned to:

  • Identify different types of force
  • Describe the unit 'newton'
  • Explain Newton's Second Law of Motion and Hooke's Law
  • Determine impulse from a force-time graph
  • Use force arrows in diagrams to show size and direction of the force
  • Provide examples of forces and pivots
  • Show the relationships between force, area, and pressure
  • Describe density, matter, mass, and volume

Our expert educators make it easy for you to get up to speed on force, rotation, pressure, and density. A brief quiz is available for each lesson to make sure you grasp the concepts studied. In addition, each lesson includes a full written transcript that you can print and use as a study tool.

13 Lessons in Chapter 18: Force, Rotation, Pressure & Density
Test your knowledge with a 30-question chapter practice test
Force: Definition and Types

1. Force: Definition and Types

Force is everywhere and it comes in a variety of sizes, directions, and types. In this video lesson, you'll identify force as well the different types of force that objects may experience.

What is a Newton? - Units & Explanation

2. What is a Newton? - Units & Explanation

A newton is a unit of measurement named after Sir Isaac Newton. It measures force and has units of kilogram meter per second squared. This lesson will describe the newton.

Overview of Newton's Second Law of Motion

3. Overview of Newton's Second Law of Motion

Have you ever had to push a broken-down car? Hopefully, the answer is no but if you have, you definitely know that the lighter the car, the easier the job. In this lesson, we learn why that is the case.

Force vs. Time & Force vs. Distance Graphs

4. Force vs. Time & Force vs. Distance Graphs

In this lesson, you'll find out how to determine impulse from a force-time graph and speed from a distance-time graph. You'll also learn how to describe the general shape of these graphs for simple harmonic motion.

Using Force Arrows in Physics Diagrams

5. Using Force Arrows in Physics Diagrams

Force arrows are a very useful way to represent the forces that act on a system. This lesson explains how force arrows can be used not only to show the forces simply, but also to predict the motion of the object that they act on.

Forces: Balanced and Unbalanced

6. Forces: Balanced and Unbalanced

Forces are needed to start or stop an object's motion, but can also be involved when an object is at rest or already traveling at constant velocity. In this video lesson, you'll identify the difference between balanced and unbalanced forces, understanding how they affect the movement of objects.

Hooke's Law & the Spring Constant: Definition & Equation

7. Hooke's Law & the Spring Constant: Definition & Equation

After watching this video, you will be able to explain what Hooke's Law is and use the equation for Hooke's Law to solve problems. A short quiz will follow.

Simple Machines: Lever, Inclined Plane & Pulley

8. Simple Machines: Lever, Inclined Plane & Pulley

Discover what a simple machine is and how it operates. Then learn about the mechanical advantages various simple machines such as levers, inclined planes and pulleys give us.

Forces & Pivots: Explanation & Examples

9. Forces & Pivots: Explanation & Examples

To understand how a lever can be used to move a heavy object, you have to know something about how forces and pivots work together to create torque. In this lesson, learn how the torque generated by a force depends on the location of the pivot point.

The Principle of Moments: Definition & Calculations

10. The Principle of Moments: Definition & Calculations

When an object is free to rotate about a fixed axis, a force applied can cause the object to rotate. This lesson deals with the principle of moments, which is the turning effect on an object provided by a force.

Force, Area & Pressure: Relationship & Applications

11. Force, Area & Pressure: Relationship & Applications

The same force can have a very different effect depending on the area over which it is exerted. In this lesson, learn about the relationship between force, area, and pressure, and how changes in pressure can have some serious consequences,

What Is Density? - Explanation & Examples

12. What Is Density? - Explanation & Examples

After watching this video, you will be able to explain what density is, give examples of high and low density, and calculate density using an equation. A short quiz will follow.

Matter, Mass & Volume

13. Matter, Mass & Volume

After completing this lesson, you will be able to explain the difference between matter, mass and volume. You'll also be able to describe how two objects can have the same mass, but different volumes. A short quiz will follow.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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