We're now ready for Newton's third law of motion.

Newton's First Law of Motion deals with inertia, which is the resistance to a change in its state of motion.

Newton's three laws of motion the first law of motion says that objects in motion stay in motion forever unless acted upon by an outside force.

Newton's First Law.

In this video, I want to talk a little bit about Newton's first law of motion,

That's Newton's First Law.

Using Newton's second law of motion, Force is mass times acceleration.

Newton's Laws of Motion.

So Newton's Second Law of Motion. This one is maybe the most famous.

Newton's law of gravitation.

Newton's laws of motion an object in motion stays in motion, unless it's affected by a net force.

So we know from Newton's Laws an object in motion tends to stay in motion.

So you really have to give Galileo credit for Newton's first law

This is absolutely true. This is actually another way of rephrasing Newton's First Law.

Steam engines, locomotives, factories, machines, all of it due to the mechanics set into motion by Isaac Newton's second law of motion, Force is equal to mass times acceleration.

Well the reason is that Newton's first law is really just a restatement of this guy's law of inertia

This is Newton's 1st law

So Newton's third law is saying,

So this Newton's first law, and I think I should do a little side here

That's what Newton's second law gives us.

There's just no way around Newton's third law.

We'll start with something very simple Newton's Law

And if this is Newton's first law then why do I have this huge picture of this guy over here?

Newton's second law describes the transfer of energy for impulse turbines.

Well, the answer is explained by Newton's Second Law.

Newton's first law says, an object at rest will stay at rest, or an object in motion will stay in motion, unless there is some unbalanced or net force but based on what we have drawn right here, it looks like there is some sort of net force.

Newton's first law says that an object at rest will stay at rest unless acted on by an external force.

So that gives you at least the sensory clue of Newton's 3rd Law.

That's different from Aristotle's Law of Motion.

In mathematical terms, Newton's Second Law says that force is the product of mass times acceleration.

This is maybe the most famous example of, Newton's third law, is just how rockets work.

In fact, today I teach Newton's Laws of Motion and you can actually calculate the forces on every single brick of the Empire State Building.

We'll start with something very simple Newton's Law The force equals mass times acceleration.

It turns out that newton's third law also applies to rotational force called 'Torque'.

This remind ourselves if there was no force acting on this body this comes straight from Newton's 1st Law of motion then the velocity would not change neither the magnitude nor the direction of the velocity will change

We happen to get round to testing, let's say, Newton's Law of Gravity about 300 years ago.

We happen to get round to testing, let's say, Newton's Law of Gravity, about 300 years ago.

According to Newton's Third Law, for every action, there is an equal and opposite reaction.

So where is this equal and opposite force that's Newton's 3rd Law tells us about?

The first is straight line motion.

History The concept of polhode motion dates back to the 17th century, and Corollary 21 to Proposition 66 in Section 11, Book 1, ofIsaac Newton's Principia.

Was Newton's theory of gravity wrong?

We use Newton's Laws of Gravity.

Using Newton's second law (with a sign convention of we can derive a system of equations for the acceleration ( a ).

The second law of motion says, Force is mass times acceleration.