# Physics of Newton's Laws of Motion, momentum & COM (5 hrs)

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Try Udemy for Business- Newtons' first law of motion - bodies in motion and rest
- Newton's second law of motion: Net Force = Mass X Acceleration
- What is weight, gravitational force and normal reaction
- What exactly is tension in a chord?
- Newton's third law of motion: making sense of action and reaction
- Conceptual understanding of free body diagram, blocks & pulleys
- Static friction and dynamic friction
- Accelerating elevators and weight loss (Part 1)
- Accelerating elevators and weight loss (Part 2)
- Center of mass | learn how to find it
- Newton's 2nd law of motion and how it relates to center of mass
- Linear momentum and Force realtionship
- Collision and Impulse | how do you calculate
- Law of conservation of linear momentum
- What exactly is elastic, inelastic and completely inelastic collision
- Momentum & energy conservation: bullet in a pendulum
- Elastic collision - velocity change with varying mass
- Collision in two dimension
- The rocket equation

- Each lesson starts with basic physics before it reaches an advanced level. You will understand faster if you have some foundation in physics

*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 Newtonâ€™s laws of motion are solved by using â€śfree body diagramsâ€ť. So if you see the horse in â€śisolationâ€ť, the horse is pulled in the direction of the cart (say right ), the horse itself is also applying a â€śforceâ€ť 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

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Newton's 3rd law of motion states that every action has an equal and opposite reaction. Well, if a horse pulls a carriage, the carriage should also pull it back with the same force. Then why does the carriage start moving? Get a keen understanding of this law that applies to all real life situations.

Newton's first law of motion is amazingly simple yet very powerful. It tells us that bodies at rest will continue to be in state of rest and those in motion will continue to be so, unless some external force acts on them. While the law is simple, a deeper study will be worthwhile.

Newton's 2nd law of motion states that the net force acting on an object is equal to the product of its mass and the acceleration, that the net force produces in the body. This law is often not put to proper use. This lesson gives a sense of what this law means and how it is applied in solving numerical problems

Making accurate free body diagrams for a system of blocks connected by chord and pulleys is an important step towards writing the correct equations of motion. This lesson explains how to make Free body diagrams (FBD), write the relevant equations and make use of Newton's 2nd law of motion.

Static and dynamic friction often shows up in numerical problems that utilize Newton's laws of motion. Learn in this lesson what static and dynamic friction is, and how you can use this understanding toÂ solveÂ problems around inclined planes in particular.

Accelerating up in an Elevator and weight loss/ gain can be very nicely explained by Newtons Laws of Motion. Watch this video to have a deep understanding of how various forces acting on a body inside a moving elevator play to increase or reduce the weight

Accelerating up in an Elevator and weight loss/ gain can be very nicely explained by Newtons Laws of Motion. Watch this video to have a deep understanding of how various forces acting on a body inside a moving elevator play to increase or reduce the weight

Finding Center of Mass can be quite easy if understood well.In this lesson, learn how to find the center of mass of system of masses. The center of mass of an object is that point in the mass or a system of masses that represents the entire mass or the system. The center of mass is the particle equivalent of a given object for application of Newton's laws of motion.

Newton's 2nd law of motion is applicable to an individual particles. The law is also applicable to the center of mass of a system of particles. This lesson helps you understand how a the center of mass of a system behaves in a way that the net force on the system equates with product of sum of masses in the system and the acceleration.

Linear momentum and force are not often used in solving questions.However there is an interesting derivation that connects the two. The rate of change of momentum of a particle is equal to the the net force on the particle. This definition extends to a system of masses as well and in a system the net force on the system equates with the product of vector sum of velocity of all particles and the sum of the masses

Collision and impulse are two important concepts within the topic of linear momentum. Impulse is nothing but change in momentum of a body. It is the product of net force and the time of the force. This in turn equates with the the product of mass and change in velocity. Watch this video to understand this concept and how it can relate to every day life

What exactly is the difference between elastic, inelastic and completely elastic collision? This is a questions students often ask when they study this lesson. Watch this video to understand the simple difference between the 3 kinds of collisions.

Momentum and energy conservation is used to find velocity of a bullet that hits a pendulum. This video explains how a completely inelastic collision can be used to find this. It also demonstrates an excellent use of the law of conservation of energy and momentum to solve real life problems

Elastic collision changes the velocity of masses that interact. It is interesting to analyze how the velocity changes with varying mass. Elastic collision applies to those collisions where the linear momentum and kinetic energy is conserved.This lesson discusses what is elastic collision and how the velocities for different masses result when collision happens

Collision in two dimension follows the momentum conservation principle (provided no external force acts on the system and it is isolated). If the collision is elastic in nature then the kinetic energy is also preserved. Watch this video to develop a better understanding of the topic.

The rocket equation is a unique case where the law of conservation of linear momentum needs to be used with some caution. Unlike most cases, here the mass of each of the body under consideration (rocket and fuel) changes every moment. Watch this video to learn how the velocity of a rocket is related to the rate of change of mass of the rocket

The problem has a boat being pulled by 3 different forces. If Net Force =0, Find vector F3. We need to find what is the value of the unknown force vector F3 and one unknown angle of one of the forces. Such problems are solved by resolution of all forces in X and Y direction and then taking sum of all forces in X direction and sum of forces in Y direction. These are then equated to the product of mass and accelerationÂ (zero in this case). As such, it is nothing but utilization of Newtons 2nd law of motion that states that Fnet = ma

When a car crashes into a wall, the seat belt provides the force that stops a car passenger from crashing forward. How do you find this force? The trick is to find the deceleration of the car. Learn, what exactly happens to the passenger as the car crashes. Learn, why deceleration of the car would determine the force that the seat belt needs to offer to restrain the passenger and Learn, why deceleration is not always negative

Static friction is the force that helps the small mass "m" to stay on top of mass M and prevents the fall. The limiting force of static friction is reached at a certain displacement of the system at X. The problem requires us to find this value X using Newton's laws of motion

The Problem requires us to find the force with which a mower needs to be pushed so that it moves at a constant speed. How do we find this. We find all forces acting on the mower and then equating the sum of the forces to the product of mass and acceleration using Newtons' 2nd law of motion.

The Problem has 3 masses tied in series and hanging vertically down. The tension and acceleration in the strings is known. The key here is to draw free body diagram (FBD) for each mass and apply Newton's second law of motions

Double inclined plane problems can be tricky. Not if you break down the problem by putting all the relevant forces in a free body diagram and then use Newton's second law of motion.

Finding Center of Mass can be quite easy if understood well.In this lesson, learn how to find the center of mass of system of masses. The center of mass of an object is that point in the mass or a system of masses that represents the entire mass or the system. The center of mass is the particle equivalent of a given object for application of Newton's laws of motion.