# Ch 17: Using Physics Formulas

### About This Chapter

## Using Physics Formulas - Chapter Summary

This comprehensive physics chapter shows you how to use a variety of physics formulas. Inside the chapter, you'll find bite-sized lessons that break down the formulas that are used to find momentum, velocity, air resistance, circular motion and much more. The chapter also includes interactive self-assessments to help you practice solving physics problems on your own. If you have a question, feel free to reach out to our instructors online at any time. You can access the chapter using any computer or mobile device, and it's available to study at any time that fits your schedule. By the end of the chapter, you should be able to:

- Make dimensional analysis calculations and conversions
- Find displacement vectors
- Explain Newton's Third Law
- Recognize spring constant, wave interference, linear momentum and buoyancy formulas
- Use formulas for rotational, projectile, circular and simple harmonic motion
- Solve problems by using velocity, energy, work, kinetic energy, force and acceleration formulas
- Explain free fall and air resistance formulas

### 1. Dimensional Analysis Practice: Calculations & Conversions

Dimensional analysis is a handy tool in unit conversion and can help several different types of questions. We will go over several examples of dimensional analysis in this lesson.

### 2. Practice Applying Velocity & Energy Formulas

Velocity and energy problems are common in physics. In this lesson we will learn how to calculate velocity and kinetic/potential energy and go through some practice problems.

### 3. Practice Finding Displacement Vectors

Displacement is the distance from the starting point. In this lesson, we'll look at several examples of displacement problems and discuss how to solve them, particularly using the laws of sine and cosine.

### 4. Practice Applying Work & Kinetic Energy Formulas

In this lesson, you're going to learn about practical applications of work and kinetic energy formulas. Specifically, we'll look at how these formulas can be applied to moving an object across a surface and lifting weights.

### 5. Practice Applying Force & Acceleration Formulas

In this lesson, we will introduce force and acceleration formulas using Newton's Force Laws and demonstrate kinematic equations, including examples, to solve real-world problems.

### 6. Practice Applying Free Fall & Air Resistance Formulas

In this lesson, we'll go through some practice problems to determine the velocity and acceleration of an object in free fall and when applying air resistance.

### 7. Practice Applying Buoyancy Formulas

In this lesson, you'll learn how to apply the buoyancy formula. You'll practice calculating the volume of different shapes and buoyant force and evaluate problems to determine if an object will float.

### 8. Practice Applying Linear Momentum Formulas

Momentum is product of mass and velocity, and it is a quantity that is always conserved in collisions. In this lesson, we will dig deep into the concept of linear momentum, including practice working momentum problems.

### 9. Practice Applying Circular Motion Formulas

We can calculate velocity, acceleration, and force when traveling in a circle. In this lesson, we'll look at some sample problems using the formulas to calculate velocity, acceleration, and force of an object traveling in a circle.

### 10. Practice Applying Newton's Third Law

This lesson will introduce the reader to Newton's Third Law and give real world examples. We'll also look at example problems that show how we can use Newton's Third Law and other equations to solve for unknown forces.

### 11. Practice Applying Spring Constant Formulas

In this lesson, you'll have the chance to practice using the spring constant formula. The lesson includes four problems of medium difficulty involving a variety of real-life applications.

### 12. Practice Applying Simple Harmonic Motion Formulas

The simple harmonic motion formulas can be used to determine the kinetic and potential energies, period, and maximum velocity of a spring in motion. In this lesson, we'll look at some examples of these formulas at work.

### 13. Practice Applying Wave Interference Formulas

Wave interference can be constructive or destructive, creating light and dark spots. We can calculate the distance between light spots, the distance between a screen and slits, and the distance between slits.

### 14. Practice Applying Projectile Motion Formulas

In this lesson, you'll have a chance to practice real-world applications of projectile motion formulas. You'll learn how to approach these problems and we'll walk you through solving them.

### 15. Practice Applying Rotational Motion Formulas

This lesson introduces the reader to rotational motion and gives examples of solving rotational motion problems such as calculating the angular velocity of an object, the rotational motion of a cylinder, and the angular kinetic energy of an object.

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### Other Chapters

Other chapters within the Physics 101: Help and Review course

- Introductory Physics: Help and Review
- Vectors: Help and Review
- Kinematics: Help and Review
- Laws of Motion: Help and Review
- Work and Energy in Physics: Help and Review
- Linear Momentum: Help and Review
- Equilibrium and Elasticity: Help and Review
- Sound and Light: Help and Review
- Fluids in Physics: Help and Review
- Laws of Thermodynamics: Help and Review
- Electrostatics: Help and Review
- Circuits in Physics: Help and Review
- The Physics of Magnetism: Help and Review
- Wave Optics: Help and Review
- Classical Relativity: Help and Review
- Modern Physics: Help and Review