How can you become really good at Newton's Laws of Motion, center of mass, linear momentum and collisions?
With over 1000 enrollments and 4.6 star rating, these 50 lessons will help and guide you to become good at this topic
If Newton's third law is true then how does a horse pull a cart. The cart should pull the horse back with the same force.
Well, when the horse pulls the cart, it is true the the cart also pulls the horse with the same force. However, the dynamics are a little more complex. Well does not mean that the force that the horse exerts on the cart has got cancelled. The cart will continue to to experience the pull and so would the horse from the cart being pulled. In a way they are 2 separate forces, each acting on separate object.
This is the reason problems around Newton's laws of motion are solved by using "free body diagrams". So if you see the horse in "isolation", the horse is pulled in the direction of the cart (say right ), the horse itself is also applying a "force" towards the left. As a result, the net force (force vector to the left and force vector to the right) produce a net force vector that makes the horse and the system move
Newton's laws of motion include three laws Newton's first law, Newton's second law, Newton's third law, that in conjunction are rock bed of classical mechanics. So you can see in the above example, how they help us understand the relationship between a mass or a body and the forces acting upon it and the motion in response to those forces.
The second part of this course introduces you to the following concepts- 1. Center of mass (com) for a system of particles , 2.The velocity and acceleration of the center of mass and 3. Linear momentum for a single particle and a system of particles We will learn how center of mass of a system of masses can represent the system as a point. We also discuss the principle of conservation of linear momentum. We will also use the concept of conservation of linear momentum to study collisions in one and two dimensions and understand how momentum of rockets and the exhaust gases changes with time
Some of the most interesting problems in Physics are found in Mechanics. Most of these problems are around inclined planes, falling objects, frictional forces (static friction and dynamic friction), mass acceleration, velocity etc. Section 2 of this course is a compilation of such interesting problems and how they can be solved using Newton's laws of motion. The course makes use of calculus in certain places
Whats different about my courses:
When I create content for the lessons, I think deeply around the areas where students struggle and feel confused. My lessons tackle these parts in depth. Also, I believe visual representation of various ideas makes a lot of impact. The lessons have visuals and animations that are thought through quite deeply

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