FISIKA VEKTOR KELAS XI [FASE F] PART 1 - KURIKULUM MERDEKA

Our first title this time is about vectors. Okay, first of all, our seven lessons are two. The first is to identify vector calculation operations by using various methods. Then the second is to identify vector components and describe vectors. Okay, the first thing we will discuss is about the scale and vector size.

So this is fundamental for all of you to understand what a vector is. Okay, the first thing we discuss is what is the understanding of scalar magnification. Scalar magnification is a magnification that has value but has no direction. So here you have to understand what is the difference between value and direction.

Here I have given the example, the example is mass. Okay, for example here we have rice that weighs 10 kilograms, which means this rice has a value, namely the weight value. The weight value is 10 kilograms. Then we weigh, yes, it produces a value of 10 kilograms. But rice that weighs 10 kilograms does not have a direction.

or automatically we make it not moving or static. So, the understanding of the scalar magnitude is a magnitude that has value but has no direction. There are still many examples of scalar magnitude, please share your search in your book or on the internet. Then we discuss about the vector magnitude. The vector magnitude is a magnitude that has value and has direction.

So we can see the difference between Scalar and Vector The difference is when it has a direction or not While the Scalar magnitude has value but no direction However, the Vector magnitude is a magnitude that has value and direction The example is potential energy We can see here, I made a simulation that this elephant has

the weight value or mass value. Then this elephant moves from top to bottom. It means there is an direction value. The direction value is from top to bottom. So there is a movement process that occurs and that is the value of the vector magnitude.

and there are still many examples of vector magnification, please find it yourself so that you can understand everything in general what are the examples of scale magnification and vector magnification. Here I just explain it in general. So here we develop the first concept of physics in our first subject about vectors that

Scalar magnitude is magnitude that only has value but has no direction. Meanwhile, vector magnitude is magnitude that has value and direction. This is one of the concepts in our first subject. Okay, let's move on to the next subject, how to describe a vector. Okay, vector here I have made a simple concept of how to describe a vector.

Vector is a long line, and this long line needs a cross. It's clear like this. Here we have a cross, O is the catch point, while B is the end of the vector. OB is the vector's size, and OB is also the direction of the vector. Okay, let's try to simulate it in the form of values.

Here, AB is 50 meters long. This length means the size. AB is 50 meters. The direction of the AB vector, here there is already a value, 30 degrees. The direction of the AB vector is 30 degrees.

So this is an important component, how to understand how to draw a vector. We must know where the point of the vector and where the end of the vector. The end of the vector is usually marked with a square and the point of the vector is not with a square. Then still in the drawing of the vector, here we must also know how to write the correct vector.

So the writing of the vector here consists of two. There is a vector symbol and there is a large vector. Usually for the vector symbol is marked with a arrow above it. The notation form is like this. This is one example of acceleration and this is the style, which means this is the magnitude of the vector. Okay, magnitude of the vector.

But this is one of the symbols. Then how to determine the size of the vector? To determine the size of the vector, it is described like this. So this is to determine the size of the vector and this is to determine the size of the vector. The correct writing of the vector. Then here we make a comparison. The first, there are two vectors said the same if the size and direction are the same.

If two vectors are the same, then the direction and the size are the same. For example, the size is the same as 50, but the direction of the vector is also the same. 30, 30. This is if two vectors are the same. Then, if we make two vectors are different,

It means that the size is the same but the direction is not the same. Here the size is the same, 50 degrees. But the direction is different. This one is 30 degrees and this one is 120 degrees. It means that these two vectors are not the same even though the values ​​are the same. So you have to understand the difference between the magnitude of the vector and the direction of the vector.

The direction of the vector is usually in the form of the angle, as long as the vector is large, how much value from the vector. Okay, we go into the multiplication and reduction of vectors. So the factor can be multiplied or reduced, so that it produces a result where this result is called the resultant vector.

So there are several methods that we use to determine the numbering and decreasing of vectors. The first thing we will discuss is the numbering of vectors using the triangle method. Here we already have vector A and vector B with different directions. Then we have to describe.

must describe the vector A and vector B so that it forms a triangle. Okay, vector A to the right, then vector B, the direction is upwards. And this is the catch point, then this is the end of the vector. Then we pull it, so this is the resultant value. So the resultant number is A + B. Okay, then it is necessary to understand

For the negative value of B, it is opposite to the direction of the vector B. If the direction of the vector B is positive, it means that the negative value is opposite to the direction. This means that this is the negative value of vector B. Same as vector A. If vector A to the right is positive, it means that for vector A with a negative value, it is opposite to the direction of vector A. It means that the direction is to the left.

And this conditional depends on the type of the question. This means that this is the negative vector A. Depends on the type of the question. Then here we make an example of the question. Two vectors A and B where vector A has a magnitude of 12 N to the right. And vector B with a magnitude of 5 N to the right as in the following image. This is vector A and this is vector B.

Determine the magnitude of these two vectors if we sum them using the triangle method. Here it's easier, we just multiply by the abjad. A and B. We start from vector A. This is vector A and this is the catch point. Then we start again from vector B. Vector B is downward. So the shape is like this. This is vector A and this is vector B.

We give the notation sign which states that this is a vector. If we do not pull the result line, and this is the result line. So the result is the magnitude of vector A plus the magnitude of vector B. The value of vector A was 12. 12 plus the value of vector B is 5. So the result of the result multiplication

between the factors A and B is 17 Newton. So this is actually quite easy to work with all of you. So here we have to understand how to describe the factor. And here we haven't looked for the result yet, we're just looking for the result of the factor multiplication. Later we will discuss how to find the result or the result of the result.

Okay, then we enter the second method, the number of vectors with the fast line method. Here we have vector A and vector B, then we draw it to produce a method that looks like a fast line. Then to draw the resultant value, it's from the O-axis we pull, we pull it up so that it forms a fast line.

And the resultant sum, so vector A, is still the same, vector A plus vector B. This is the "Hard Line Method". Then, the sum of vectors using the Polygon Method or "Multi-Range". So here there is a vector that is more than 1 or more than 2, that's called the Polygon Method or "Multi-Range".

Here I made an example of 3, there are vectors A, B, and C. How to describe it? Simply, we start from the abstract, we adjust the abstract A, B, and C. Here we make the resultant values of all the sum. Earlier it was explained that this has a positive and negative value.

If the positive value is to the right, the negative value is to the left. If the positive value is to the top, the negative value is to the bottom. If the positive value is to the top, the negative value is to the bottom. Now we take the multiplication. This is the vector A, the arrow, then we start again from vector B, which is the catch point.

we put it here, produce a vector B and this is the end of vector B then we enter vector C if we pull, this is the value of the resultant sum in the polygon method means this is the resultant vector A plus vector B plus vector C this is the sum of vectors with polygon method the concept is the same as the one at the beginning we must know how

how to describe a vector. Okay, then we have discussed about vector multiplication in the line method. And now to understand how the reduction is the same, it means if we make the reduction, it means that the value of B is positive.

The value of A is already positive. Then, if we draw it using the "Hard Line Method", it produces a decrease value, which means that the negative value of this B vector is down. This means that this is the negative value of the B vector. The value of the B vector is negative. Whereas A, the negative value of the vector is to the left. So, friends, you have to understand how the value of the positive vector and the negative value. If we draw it,

Between positive A and negative B with the method of the thick line, the direction is like this. This is the vector A to the right, then this is the negative B to the bottom. It means that here is the end of the vector, the end of the vector. We pull between the two vectors from the point O, which is the catch point and produces the resultant value. A earlier had a positive value, vector A, and vector B negative.

So the factor reduction is A minus B. So this is the concept of the method of the chain of chains. Okay, then now we enter how to determine the magnitude of the resultant factor using the cosine formula. So it's easy for us to determine how big the resultant is by using the cosine formula.

Because it's easier to understand and faster to solve the equation. For example, from the previous string method, the resultant value is here. But here we don't discuss the numbering and decreasing of the factor, but we discuss the resultant value.

To determine the result of the resultant value, the equation is a^2 + b^2 + 2ab cos alpha. This is the first equation. Then the second equation, which is related to the angle and the angle and the factor's value. The equation is r/sin alpha = b

Alper Sin Theta equals Alper Sin Alpha minus Theta. So there are two similarities that must be understood by all of you. A is the largest vector A, which means the largest vector A is here. This is the largest vector A. B is the largest vector B. This is the largest vector B. Then R

is the resultant ratio between the A and B vectors. This is the A and B vectors, and this is the resultant ratio. For simplicity, let's discuss the following example. Two A and B vectors each form a 60 degree angle, one with the other. Okay, A and B vectors. Let's say we make this one is A, and this one is B. This is B, and this one is A.

and the angle is 60 degrees. If the length of the second vector is 5 and 3 units, this is in order, yes, it means this is A, this is B. It means that A is 5 units, and B is 3 units. It means that if it's like that, it's too long, yes. We shorten it first. Okay, the length is

3 units, this one is longer than the vector fit. Then the result of these two vectors is, we want to find the result of the result value. If we want to use the method of the thick line, it means we pull between the two vectors A and B, until we get a picture like a thick line. Say the picture is like this.

The picture is not too good, but the result is like this. Then we enter the equation, which means R is equal to root a squared plus b squared plus 2ab cos alpha. The value of a

The big one is 5, so the root of 5^2 + b = 3, 3^2 + 2 * 5 * 3 * cos 60

Okay, then we finish, 5^2 is 25, then 3^2 is 9, plus 2 times 5 is 10, 10 times 3 is 30. 30 multiplied by cos 60 is 1/2. So, friends, you all have to memorize the sine and cosinus values of the special angles.

That is a requirement for all of you to be able to solve the questions on the vector. Then here we finish, here 30 divided by 2 is 15. Then if we finish it, the result here is 49. The root of 49 is what? The result is 7. So the result of the two vectors A and B is 7. Okay, video.

This first part, hopefully, can be understood by all of you in a conceptual and mutual way. So for those of you who still don't understand, please write in the comments column. I close and I end. Thank you.