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Natural S. Week 10 Plan. Monday, 1st of June

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Subido el 26 de mayo de 2020 por Pedro Ignacio G.

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Good morning to you all. I'm going to tell you what you have to do today for Natural Sciences. 00:00:06
Okay, so as usual, everybody clicks on Mi Clase, then we go to Contenido and go to Natural Sciences. 00:00:14
so we're still doing unit 5 forces and we are going to learn about something that you have 00:00:27
heard already because you know about that which is gravity so gravity is a non-contact force 00:00:38
It's a pulling force and it pulls towards the center of the objects, okay? 00:00:50
So it was discovered by Newton and he realized that once he was reading down a tree 00:00:59
and suddenly an apple fell down and smacked his head, all right? 00:01:09
So it was a hundred of years ago and, well, we will read about Newton in a few lessons time. 00:01:18
un día que estaba sentado debajo de un árbol leyendo y le cayó una manzana del 00:01:50
árbol y se puso a pensar sobre eso y entonces empezó a generar su teoría 00:01:57
sobre la gravedad pero bueno ya aprenderemos algo más 00:02:03
sobre newton en el futuro we are going to learn about gravity and weight vamos 00:02:08
escuch vamos a aprender sobre pues una fuerza nueva que es la gravedad y otra fuerza nueva que 00:02:18
también conocemos que es el peso estas dos palabras seguro que las conocéis todos pero 00:02:28
bueno vamos a aprender un poco más que son cada una so what is gravity gravity is a non contact 00:02:34
force and is a pull force. Remember that we knew different ways of classifying forces. 00:02:44
In this case, gravity, we say that is a non-contact and is a pull force. And all objects, 00:02:55
it's not right that all objects have gravity, but all objects are attracted by other objects or 00:03:03
attract other objects, all right? So, as we were saying, it's a non-contact force that 00:03:12
pulls towards the center of objects, all right? This force is noticeable with very large objects, 00:03:20
all right? So, the gravity that we could attract with is very small, while the gravity on Earth 00:03:30
is is very big because the earth is a very big planet and um the gravity is this pulling force 00:03:42
that pulls us towards the center of the earth as you can see with these arrows and this prevents us 00:03:52
from floating away this is the reason we are not floating because when we are in the in the 00:03:59
downside of the the earth nobody is falling down all right so because of gravity we stay on the 00:04:07
ground and we're not floating everything that we throw up it will go down again we cannot leave 00:04:17
very big objects objects with a large mass large mass and the moon orbits the earth instead of 00:04:27
flying away it's it's all the time around us surrounding the earth okay moving around 00:04:39
what happened with the earth and the moon so big objects have a stronger pull towards 00:04:46
their center than smaller objects all right so the bigger the object as i said before 00:04:56
the more gravity so the earth is six times bigger than the moon so obviously it will have more 00:05:03
gravity force than the moon which is six times uh smaller so the gravity will be six times 00:05:14
smaller too, all right? So we can see that the Earth has a gravity of 10, it would be 10 meters 00:05:25
by square second, but you will learn about that in a few years, okay? And in the Moon it's 1.6, 00:05:35
So, obviously, it means that in the moon we would be lighter than on Earth, okay? 00:05:45
So, it says that it could be easier to jump because there is less gravity than on Earth, right? 00:05:55
Bueno, lo cuento en español rápidamente. 00:06:07
gravity is a force without contact and it is a force of grip that all objects have 00:06:10
according to gravity it pulls all objects towards the center of the earth in this case and we can 00:06:19
see the arrows of agreement and that makes us not float and that the people who are 00:06:29
down here does not fall in agreement because we are continuously attracted 00:06:37
by objects gravity says here it is noticeable this means that it is 00:06:42
noticed that it can be perceived in large objects and when we talk about 00:06:48
large objects we are talking about incredibly large objects such as 00:06:55
for example planets agree an object like a building because it also generates 00:06:59
a gravitational attraction force but much smaller so small that 00:07:07
it is that I do not know that it is impossible to perceive it in agreement or that is that when 00:07:13
we are talking about very large of the objects we are talking about massively 00:07:19
large objects of objects that are immense in agreement well because of gravity 00:07:25
due to gravity we stay stuck to the ground and we are not floating due to gravity everything 00:07:32
that we throw into the air falls again or we cannot lift an object with a very large mass and 00:07:40
this mass has stayed with it because we are going to see it now a little later and due to 00:07:46
gravity the moon is orbiting around the earth and it has not yet moved away from the earth 00:07:52
de acuerdo sigue dando vueltas una y otra vez alrededor de la tierra de acuerdo esto es porque 00:07:59
la luna se ve atraída también por la gravedad de la tierra bueno vamos a ver un poco más sobre la 00:08:07
tierra y la luna bueno tenemos que saber que cuanto más grande es el objeto mayor gravedad 00:08:14
generates according to that the earth that is six times larger than the moon generates a gravity that is also 00:08:24
six times larger than that of the moon according to this which means that well we would give the 00:08:37
gravity a value of 10 are 10 meters per second squared is a measure of acceleration but well 00:08:46
this you will see later and the gravity on the moon would be 1.6 00:08:54
agreement when there is less gravity on the moon because what you will have seen happens in 00:09:00
some video surely by youtube or in some documentary that is that people 00:09:07
can move around the moon giving jumps and very long jumps because 00:09:14
Precisamente, la fuerza de la gravedad es mucho menor. 00:09:19
Okay, let's go for the next thing. 00:09:24
Mass and weight. 00:09:26
Mass and weight. 00:09:28
So, it's very important to feel the difference between these two, okay? 00:09:30
Because they are not the same, okay? 00:09:36
Mass is the amount of matter in an object, all right? 00:09:39
It's measured in kilograms. 00:09:43
And weight is another thing, all right? 00:09:45
weight is a force, okay? And it is calculated by multiplying mass by gravity, okay? And it is 00:09:48
measured in newtons, newtons. Remember that we've talked about newton before? So, because of newton, 00:09:58
they decided to name this force, okay? So, as we have to multiply mass by gravity, we can 00:10:06
calculate the weight with different gravities. And look at the example. The dog has a mass of 00:10:19
10 kilograms, all right? 10 kilograms. Its mass is the same on Earth and the Moon because it 00:10:29
doesn't change okay but what changes is the gravity as the gravity changes the 00:10:35
weight the weight would change too all right so the dog that is 10 kilograms on 00:10:43
earth the weight would be calculated multiplying 10 by 10 which is 10 100 00:10:54
newtons, okay? But on the Moon, the mass would be 10 kilos multiplied by 1.6, that gives us 00:11:01
16 newtons. So we can see that the weight on Earth is bigger than the weight on the Moon, okay? 00:11:13
And this is obviously because the gravity on Earth is stronger than the gravity on the moon. 00:11:24
En español, muy rápido. Tenemos la masa y el peso. 00:11:33
Y no tenemos que confundirlos, ¿de acuerdo? Porque esto normalmente se suelen confundir. 00:11:38
La masa es la cantidad de materia que tiene un objeto, ¿de acuerdo? 00:11:46
If an object is bigger, if it is smaller, the amount of mass. 00:11:50
And it is measured in kilograms. 00:11:55
In kilograms, kilograms. 00:11:58
It is the same word in English and in Spanish. 00:12:00
And weight is weight. 00:12:02
And weight is a force. 00:12:04
Okay? 00:12:07
And this force, how is it calculated? 00:12:07
It is calculated by multiplying the mass, which was the amount of matter, by gravity, 00:12:10
which is this force that we had said that it was a non contact pool in force a 00:12:15
gravity was a force without contact of grip of agreement and when we multiply 00:12:21
the mass by gravity we have the weight that is measured in newtons we are going to 00:12:29
understand this easier for example this little dog on earth and on the moon in 00:12:37
both places its mass is 10 kilograms that does not change because the dog is the same 00:12:42
however the weight does change because because while on earth to 00:12:47
calculate the weight we have to multiply the mass which are 10 kilograms by 10 00:12:54
which was the value that we had given to the gravity of the earth because the force 00:12:59
that we would have the weight that we would have would be 100 newtons however in the 00:13:05
moon to calculate the weight we would multiply the mass which are the same 10 00:13:10
kilograms but this time for the gravity of the moon which are 1.6 1.6 the 00:13:14
result 16 newtons as you can see the mass is the same both on earth and 00:13:20
on the moon but the weight is much greater on earth than on the moon because 00:13:26
because the gravity on earth is much stronger than on the moon well this is 00:13:31
toda la teoría que tenéis que hacer por hoy. Ahora tendríais que... You should go back here, 00:13:39
get into the plus zone, and go to the digital activities, and do activity 5, gravity and weight, 00:13:47
click on the sentences related to gravity. Which of these one is related to gravity? You click on 00:13:58
demo okay there are more than one what are which of these words of these 00:14:04
phrases are related to gravity because those that are related 00:14:10
you click ok there are more than one in number six click on the right answer ok 00:14:14
we have to click we read the phrase and we have to see if it refers to 00:14:22
gravity or weight to magnetism or weight we are reading phrase by phrase and 00:14:27
we decide that it is describing and well this would be all for today but I remind you that there is 00:14:32
one more livework sheet that you have to do that was also on the table for today 00:14:39
agree and that next day of this week you also have another sheet to do in 00:14:46
livework sheets that is, this means that you have to do two sheets of livework sheets this 00:14:54
week good guys a hug to all and that you are very good 00:15:00
Subido por:
Pedro Ignacio G.
Licencia:
Todos los derechos reservados
Visualizaciones:
97
Fecha:
26 de mayo de 2020 - 17:20
Visibilidad:
Público
Centro:
CP INF-PRI ALHAMBRA
Duración:
15′ 06″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
94.97 MBytes

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