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Physics Ninja: Mastering Newton's Laws of Motion

Name: Physics Ninja: Mastering Newton's Laws of Motion
Rating: 4.7 (148 reviews)

Comprehensive course including lectures and problem solving tutorials.

Created byEric Meloche, Ph.D.

Last updated 6/2025

English

English [Auto],

What you'll learn

This course will teach you how to apply Newton's Laws of Motion to solve all types of problems.
Draw free body diagrams
Learn how to solve problems with pulleys and springs
Learn how to solve circular motion problems

Course content

12 sections • 120 lectures • 9h 0m total length

Introduction2:38
Vector Notation4:51
Components4:28
Example 14:53
Example 23:02
Adding Vectors2:19
Example - Adding Vectors3:23
Example: Adding Vectors - Harder Example4:47
Vectors: The End0:19

Intro1:24
Explore the variety of forces that act on objects, including gravity, spring, tension, normal, friction, drag, buoyant, and thrust forces, and how they influence motion.
Push and Pull Forces1:07
Introduction to Gravity4:03
More on Gravity1:49
Weight10:02
Weight vs Mass: What's the difference?1:23
The weird Normal Force2:39
Friction Force - Part 17:21
Friction Force - Part 24:46
Tension Force5:59
Example: Hanging Stoplight Problem10:28
Form a two-dimensional equilibrium problem for a 100-newton stoplight by drawing a free-body diagram, resolving tensions T1 and T2 into x and y components, and applying equilibrium equations to solve.
Spring Forces12:17

Newton's Second Law3:29
Units of Force1:20
More about Newton's Second Law2:08
Free Body Diagrams2:00
Simple Example7:31
Newton's Third Law Introduction2:22
Newton's Third Law - Continue2:31
Action-Reaction Pairs2:07
Analyze action–reaction pairs by examining forces on a cantaloupe, the table, and the earth, including gravity, and identify the corresponding forces on different objects using free-body diagrams.
Example Problem4:49
Newton's Laws Example Problems - Introduction0:43
Example 1: Concept Question3:46
Example 2: Push a block against the wall4:12
Example 3: Tension Problem3:06
Example 4: Tension Problem2:41
Example 5: Newton's Third Law Concept Question2:09
Example 6: Finding the Normal Force2:25
Example 7: Static Friction3:14
Example 8: Finding the Tension4:32
Example 9: Weight on the Moon3:44
Example 10: Reading on the spring scale2:42

Introduction to Problem Set0:46
Explore a set of ten multiple-choice problems on contact and friction forces, and practice free body diagrams with labeled forces to reach solutions.
Solution: Example 15:13
draw free body diagrams for the three blocks and apply action-reaction and contact-force concepts; on a frictionless table, F must exceed n1 and n2 for a common rightward acceleration.
Solution: Example 23:46
Solution: Example 34:38
Solution: Example 45:22
Solution: Example 53:10
Solution: Example 63:56
Solution: Example 73:36
Solution: Example 86:03
Solution: Example 95:01
Solution: Example 102:51

Introduction to Pulleys and Springs Problem Set0:50
Learn to set up pulley problems with free body diagrams and Newton's second law, then solve for quantities; explore one- or two-spring systems to find stretch.
Pulley Problem 19:06
Learn two ways to solve a frictionless pulley problem with two masses using free body diagrams and Newton's laws; eliminate tension and apply limits to find the acceleration.
Pulley Problem 27:12
Pulley Problem 36:56
Pulley Problem 45:41
Pulley Problem 56:00
Pulley Problem 64:11
Spring Problem 12:36
Spring Problem 22:33
Spring Problem 35:26
Analyze two identical springs in series supporting a 5 kg mass to find each spring's stretch and the total extension using Hooke's law and equilibrium.

Introduction to Uniform Circular Motion1:06
Explore uniform circular motion by examining objects moving in circles with constant speed, from satellites to cars on turns, as a direct application of Newton's second law.
Uniform Circular Motion: Part 13:55
Uniform Circular Motion: Part 21:51
Uniform Circular Motion: Direction of Acceleration3:59
Magnitude of the Centripetal Acceleration3:49
What provides the centripetal force?2:01
Examples of Centripetal Forces3:22
Problem Solving Strategy2:32
Draw a free body diagram, choose a radial axis toward the center, decompose forces into radial and tangential components, and apply F = ma with a = v^2/r to solve.
Speed vs Angular Velocity4:18
Centripetal Motion: Example 11:37
Centripetal Motion: Example 2 - Angular Velocity4:49
Centripetal Motion: Example 31:49
Centripetal Motion: Example 4 - The Conical Pendulum7:49
Centripetal Motion: Example 5: Car going around a curve7:03
Centripetal Motion: Example 6 - Car going around a banked curve7:24
Set the bank angle on a frictionless curve so a car at 13.4 m/s rounds a 35 m radius, with tan theta = v^2/(g r).

Introduction to Comprehensive Problems0:43
Solution: Problem 15:31
Solution: Problem 27:26
Solution: Problem 310:04
Solution: Problem 49:17
Solution: Problem 53:10
Solution: Problem 63:10
Solution: Problem 74:36
Solution: Problem 83:02
Rank accelerations in a two-mass Atwood machine on a frictionless pulley from greatest to least using a = (m2 - m1) g /(m1 + m2).
Solution: Problem 93:37
Compute the circular orbit speed of a satellite at altitude equal to twice the planet’s radius using Newton's law of gravitation, giving v = sqrt(G M_p /(3R)).
Solution: Problem 103:02
Solution: Problem 114:52
Solution: Problem 122:11
Solution: Problem 135:04
Analyze a 3.7 kg mass on a 30-degree incline connected to a 2.3 kg mass via a frictionless pulley, deriving acceleration and tension using Newton's laws.
Solution: Problem 148:19
Solution: Problem 1511:32
Solution: Problem 166:26
Solution: Problem 179:49
Solution: Problem 184:52
Compute the edge speed of a 4.6 m radius merry-go-round (30 s period) to 0.96 m/s, then determine μs ≈ 0.02 for circular motion.
Solution: Problem 193:58
Solution: Problem 206:35

Requirements

Basic algebra and some calculus (very little).

Description

This comprehensive course covers Newton's Laws of Motion. The course is taught by Dr.E, an award winning instructor with over 15 years of teaching and tutoring experience. The course combines lectures that summarize the important concepts and tutorials that will guide you and help you develop a problem solving strategy. You'll learn how to apply Newton's laws to study particles in equilibrium and the dynamics of particles when forces are acting on them.

Topics include in this class are:

1) Vector Review

Review vector addition and subtraction,
Adding vectors using graphical methods
Adding vector using components

2) Newton's First Law

Problem solving strategies
Free-body diagrams
Example problems for objects in equilibrium.

3) Forces

Review of push and pull forces
Understanding the force of gravity
The difference between weight and mass
Friction Forces: Kinetic vs Static
Normal Forces
Tension Forces
Forces due to a spring: Hooke's Law

4) Newton's 2nd and 3rd Law

Drawing Free Body Diagrams
Calculating acceleration
Action-reaction pairs
Strategy to solve problems
Example problems

5) Mastering Problems

a) Elevator Problems

Drawing Free body diagrams
Calculate acceleration and effective mass

b) Block on a slope

Understanding the Free Body Diagram
Calculating Acceleration
What happens when we add friction - kinetic and static friction

c) Pulleys and Springs

Learn how to solve dynamic problems that contain pulleys
Atwood's machine: Calculating acceleration and Tension
Dealing with springs in series and in parallel

5) Dynamics of Uniform Circular Motion

Centripetal forces and centripetal acceleration
Problem solving strategies for circular motion
Period, frequency, and angular veloctiy
Banked curve problems

There are over 60 fully solved problems ranging in difficulty. I've mixed in many conceptual problems as well as algebraic problems to help you practice applying Newton's laws to solve problems.

If at any point you don't understand something in my videos please feel free to reach out. I'm always willing to help someone learn. Physics Ninja always has your back!

If have a specific problem not covered in this class simply email it to me and i'll add a video showing how to solve the problem.

Happy Learning

Dr. E, Physics Ninja and Expert Physics and Math Teacher.

Who this course is for:

AP Physics students and First Year undergraduate physics students
Anyone who wants to learn basic physics
JEE Exam students

Physics Ninja: Mastering Newton's Laws of Motion

What you'll learn

Explore related topics

Course content

Introduction9 lectures • 31min

Newton's First Law5 lectures • 19min

Forces12 lectures • 1hr 3min

Newton's Second and Third Laws20 lectures • 1hr 2min

Apparent Weight and Elevator Problems5 lectures • 19min

Block on a Slope8 lectures • 45min

Contact and Friction Forces Multiple Choice Problems11 lectures • 44min

Pulleys and Springs10 lectures • 51min

Uniform Circular Motion15 lectures • 57min

Comprehensive Problems21 lectures • 1hr 57min

Requirements

Description

Who this course is for: