Ch 2: Principles of Physics

About This Chapter

Let us help you master the principles of agricultural physics, including acceleration, velocity and force, with the fun lessons in this chapter. These learning tools are available to you on any mobile device at any time so you can study for an entrance exam or get help with an assignment at your convenience.

Principles of Physics - Chapter Summary

This chapter on the principles of physics includes lessons on the difference between speed, acceleration and velocity, as well as the formula to calculate acceleration. Lessons explain the parallelogram of forces, how impulse and momentum are related and the factors that lead to static equilibrium. You'll also review the two main ways friction is found on Earth and what is made possible by friction. Other topics outlined include how pumps work in physics and why they're used. After working through this chapter, you will be able to:

  • Describe the difference between speed and velocity
  • Explain the force-field analysis change model
  • Detail how pressure is measured
  • Outline how surface tension is made possible by intermolecular forces
  • Give examples of the five laws of friction

If you have any difficulty as you read through these lessons, contact an instructor for help. These learning tools are available to you on any tablet, computer or mobile phone at any time, so you can study at your leisure. Test yourself ahead of an exam by taking our multiple-choice quizzes to see how well you'd do.

11 Lessons in Chapter 2: Principles of Physics
Test your knowledge with a 30-question chapter practice test
Speed and Velocity: Concepts and Formulas

1. Speed and Velocity: Concepts and Formulas

Did you know that an object's speed and velocity may not be the same? This lesson describes the concepts of speed and velocity relating to objects in motion. We'll look at a specific example to help learn how to calculate both speed and velocity.

What is Acceleration? - Definition and Formula

2. What is Acceleration? - Definition and Formula

This lesson describes the difference between speed, velocity and acceleration. Examples are used to help you understand the concept of acceleration and learn to calculate acceleration with a mathematical formula.

Kurt Lewin's Force-Field Analysis Change Model

3. Kurt Lewin's Force-Field Analysis Change Model

Kurt Lewin's force field analysis change model was designed to weigh the driving and restraining forces that affect change in organizations. The 'force field' can be described as two opposite forces working for and against change. In this lesson, we'll learn how to analyze the force field.

Understanding Parallelogram of Forces

4. Understanding Parallelogram of Forces

To find the resultant of two forces, you can use the parallelogram of forces law. In this lesson, learn about why the parallelogram of forces works and how to apply it.

Momentum and Impulse: Definition, Theorem and Examples

5. Momentum and Impulse: Definition, Theorem and Examples

To understand how a change in momentum affects an object, we look to impulse. In this lesson, you'll understand how impulse describes an object's change in momentum, as well as how changing the force or time of the impulse can have very different outcomes.

Static Equilibrium of Rigid Bodies

6. Static Equilibrium of Rigid Bodies

What is static equilibrium? Learn about the factors that cause an object to remain stationary, without translating or rotating. Then take a quiz to make sure your understanding hasn't remained static.

Pressure: Definition, Units, and Conversions

7. Pressure: Definition, Units, and Conversions

Have you ever wondered what pressure is and how it gets measured? In this lesson, we are going to define pressure and explain some of the units that are used to express measurements of pressure.

Surface Tension, Capillary Action, Viscosity & Physical Changes

8. Surface Tension, Capillary Action, Viscosity & Physical Changes

There are many mysteries in the universe. This lesson will focus on a few that can be easily explained due to intermolecular forces, mainly surface tension, capillary action, viscosity, and physical changes.

Friction: Definition and Types

9. Friction: Definition and Types

You experience friction all the time, and you should be glad you do! Friction helps keep stationary objects in place as well as slow moving objects down as they slide across a surface. This lesson identifies what friction is and explains the two ways we find this force on earth.

The Five Laws of Friction

10. The Five Laws of Friction

Friction is a force that slows things down and keeps them from moving. In this lesson, learn about five simple rules that will help you to understand and calculate friction forces.

How Pumps Work: Operation & Performance

11. How Pumps Work: Operation & Performance

A pump allows us to move liquids or gases from one place to another. Whether it is to pump some hand sanitizer onto your hands to protect you from germs, or to pump gasoline in your vehicle to get you down the road. Suppose you had a flat tire on your bicycle, how would you fix it without a pump? Pumps are all around us, let us take a look at how they work!

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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