About This Chapter
Understanding Motion in Physics - Chapter Summary
Use these lessons to better understand relevant terms, laws and formulas related to motion. You'll explore momentum, friction, velocity, acceleration and vectors. Each lesson comes with a practice quiz that allows you to apply these formulas and practice solving motion-related problems. Upon completing the chapter, you should be able to do the following:
- Provide details about the laws of motion
- Explain the relationship between momentum and impulse, and use the law of conservation of momentum
- Solve momentum and vector resolution problems
- Detail the result of force upon an object
- List the types of friction and vectors
- Calculate vector addition and the scalar multiplication of vectors
- Understand the principles of motion in a plane and projectile motion
- Describe uniform circular motion
- Differentiate between speed and velocity, and know the formulas for instantaneous speed and velocity
- Determine the answers to problems combining acceleration, velocity, displacement and position
- Discuss relative velocity in kinematics
Prepared by professional science educators, these lessons contain illustrations and detailed examples that make learning this material easy and engaging. The lessons are accessible at any time, on any device, and transcripts can be printed for quick reference. Take the self-assessment quizzes to measure how much you have retained from each lesson and what topics, if any, you'll need to review further.
1. What is Motion? - Definition & Laws
Motion is the act of moving and plays a huge role in the study of physics. This lesson walks through important terms and the laws of motion that guide the study of motion.
2. 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.
3. The Law of Conservation of Momentum
After completing this lesson, you will be able to explain what conservation of momentum is and use the equation for conservation of momentum to solve problems. A short quiz will follow.
4. Implications of Mechanics on Objects
Forces act on objects causing them to move. Mechanics is the field of science designated to the study of moving objects. This lesson describes how forces act on objects resulting in motion. Examples are used to describe how forces interact resulting in both simple and complex movement.
5. 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.
6. What Is a Vector? - Definition & Types
After watching this lesson, you will be able to explain what vectors are in physics, give some examples of vectors and have a basic idea of how they can be manipulated mathematically. A short quiz will follow.
7. Vector Addition (Geometric Approach): Explanation & Examples
After watching this video, you will be able to explain why we might need to add two vectors and, given magnitudes and directions, add two vectors using geometric methods. A short quiz will follow.
8. Scalar Multiplication of Vectors: Definition & Calculations
After watching this video, you will be able to explain what scalar multiplication is and complete basic calculations involving the scalar multiplication of vectors. A short quiz will follow.
9. Vector Resolution: Definition & Practice Problems
After watching this lesson, you will be able to explain what vector resolution is and solve problems involving vector resolution. A short quiz will follow.
10. Motion in a Plane: Principles & Calculations
Motion in a plane includes linear motion, rotational motion, and projectile motion. This lesson will focus on two-dimensional, linear motion of a single object, and linear motion of two objects moving relative to each other. In both scenarios unit-vectors will be utilized to organize the displacements, velocities, and accelerations of the object(s); and techniques will taught that help to solve these types of kinematics problems.
11. Projectile Motion: Definition and Examples
A projectile is any object that is given an initial velocity and then follows a path determined entirely by gravity. In this lesson, we will introduce projectile motion and touch on a few key facts to keep in mind when working through these problems.
12. Uniform Circular Motion: Definition & Mathematics
After watching this lesson, you will be able to explain what uniform circular motion is, in terms of both acceleration and forces. You will also be able to use equations for centripetal force and acceleration to solve problems. A short quiz will follow.
13. Speed and Velocity: Difference and Examples
Is it possible to drive with a speed of 100 mph but a velocity of 0? In this lesson, we will examine the difference between speed and velocity and use that information to answer this question.
14. Instantaneous Velocity: Definition & Formula
When driving, never take your eyes off the road! That said, it's necessary to occasionally glance at the speedometer. When you do, you are reading your instantaneous velocity. This lesson explores the science behind instantaneous velocity.
15. Instantaneous Speed: Definition, Formula & Example
In this lesson, we'll learn about instantaneous speed, the difference between it and average speed, and the formulas for calculating both of them. Examples will be provided, and a quiz will let you test your understanding.
16. Acceleration: Definition, Equation and Examples
Acceleration can be a tricky topic for many students who tend to get hung up on an object's speed. In this lesson, we will explore the common aspects of acceleration and why speed is not always important.
17. Uniformly-Accelerated Motion and the Big Five Kinematics Equations
In this lesson, we will begin to solve problems that combine position, displacement, velocity, and acceleration. I will introduce the Big Five Equations to help you on your way.
18. Understanding Relative Velocity in Kinematics
After completing this lesson, you will be able to explain what relative velocity is in kinematics and calculate relative velocities in basic situations. A short quiz will follow the lesson summary.
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