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Gravity. Written by: ABDEL DAYEM AL KAHEEL www.kaheel7.com Prepared by: Ahmed Adham ahmed.adham.eg@gmail.com Dina Shawky dinashawkyeg@gmail.com. Our Agenda. In this presentation we will demonstrate the following points: The aim of the presentation. What is gravity?

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gravity

Gravity

Written by:

ABDEL DAYEM AL KAHEEL

www.kaheel7.com

Prepared by:

Ahmed Adham

ahmed.adham.eg@gmail.com

Dina Shawky

dinashawkyeg@gmail.com

our agenda
Our Agenda

In this presentation we will demonstrate the following points:

  • The aim of the presentation.
  • What is gravity?
  • Can we see gravity?
  • Feeling the effect of gravity.
  • Absence of gravity.
  • Gravity around earth.
  • Gravity and light.
  • Gravity and astronomy.
  • Gravity in the religion of Islam.
slide4
This presentation has an aim to spread

culture of the scientific miracle

in the Qur'an and Sunnah

to demonstrate the

Tolerance of Islam

to prove that this religion is away from

fanaticism and ignorance.

slide6
Also it is a force that causes things to fall when they are dropped.The force of gravity gives things their weight.
  • Gravity or gravitation is a natural phenomenon by
  • which objects with mass attract one another.
  • Every object has its own force of gravity.
  • Gravity depends on the amount of material that
  • makes up an object. The more material an object has,
  • the stronger is its force of gravity. The force of gravity
  • between two objects decreases as the objects get
  • farther apart.
isaac newton

Isaac Newton

  • He stated that :any two objects or particles having nonzero mass,
  • the force of gravity tends to attract them toward each other.
  • Gravity operates on objects of all sizes, from subatomic particles
  • to clusters of galaxies. It also operates over all distances, no
  • matter how small or great.

Was the first one to discover the law of gravity in the 17thcentury.

slide11
When a man wants to parachute out of a plane he falls down towards the ground because of gravity.

Gravity

Ground

slide12

Also

With gravity

Against gravity

When we descend down we don’t feel tired

But we feel tired when we ascend up

Walking on earth is the natural movement

life on earth is impossible without gravity
Life on earth is impossible without Gravity

A big mess

is the only description of our earth in case of absence of Gravity.

slide16
It turns out that in some places you will feel slightly heavier than others. The next map will show us in exaggerated highs and lows where the gravitational field of earth is relatively strong and weak.
slide17
A low spot can be seen just off the coast of India, while a relative high occurs in the South Pacific Ocean.
  • The cause of these irregularities is unknown since present surface features do not appear dominant.
  • Scientists hypothesize that factors that are more important lay in deep underground structures and may be related to the earth's appearance in the distant past.
slide18
Yes

Is light affected by gravity?

slide19
The speed of light is still constant.Light is affected by gravity, but not in its speed. General relativity gives two effects of gravity on light.

1

2

It can bend light (which includes effects such as gravitational lensing) by warping space so that what the light beam sees as "straight" is not straight to an outside observer.

It can change the energy of light by shifting the frequency of the light (gravitational redshift) not by changing light speed.

slide21
Astronomers say that all the planets

have gravity that attracts the nearby bodies and

the force of gravity is proportional

to the mass of this planet

and

the distance between it and the bodies that it attracts

slide22
So that, all the cosmic bodies like the sun, moon, planets, stars, and cosmic dust, etc..

all have gravitational fields.

slide24
No

Is the Gravity equal in all planets?

slide25
The moon has its own gravity, but it is not as strong as that of Earth. That is why astronauts on the moon can carry equipment that would be too heavy to carry on Earth.
slide26
On Earth, you might be able to jump 3 feet (almost 1 meter). On the moon, which has low gravity, you might jump 20 feet (6 meters). On Jupiter, which has high gravity, you could jump only 14 inches (35 centimeters).

On Earth

On Jupiter

On the moon

an astronaut who finds juggling fruit is easy without earth s gravity pulling it down
An astronaut who finds juggling fruit is easy without Earth's gravity pulling it down.

Fun in space

slide28
Therefore the earth has a gravity field that attracts people to it and because of this gravity the objects are settled on the surface of the earth even the atmosphere.
slide29

This means that if there wasn't a gravitational field for the earth, the atmosphere would have escaped and faded away in the outer space.

Hence, the gravity is the reason for the stability of life on earth.

slide32
(Allah, it is He Who has made for you

the earth as a dwelling place

and the sky as a canopy, and has given you

shape and made your shapes good (looking)

and has provided you with good things.

That is Allah, your Lord: so blessed be Allah,

the Lord of the ‘Âlamîn

(mankind, jinn and all that exists)).

[Sûrat Ghafir, verse: 64]

the explanation of the verse
The explanation of the verse

Almighty God talks about his graces that He bestowed upon his people.

From these graces that He be exalted made

the earth settled for its inhabitants

and made the sky as a canopy.

He also created mankind in the best shape and He provided them with good things.

the point of inimitability
The point of inimitability

Through Gods saying: (Allah, it is He Who has made for you the earth as a dwelling place), we notice that God be He exalted told us about

the grace of settling the earth and settling the objects on its surface.

And the word (dwelling) refers to the stability of creatures on the earth which is an indication to the gravity and that is what scientists have discovered.

allah almighty says
Allah Almighty Says:

(And on the earth are signs for

those who have Faith with certainty.(

(Sûrat Az-Zariyat- verse 20)

slide36

In the Qur’an Allah talks to all mankind (Muslims and non Muslims), for Muslims to increase their faith and to fix them on Islam and for non Muslims to guide them to the straight way of Allah to lead them to heaven where is the eternity life.

sources
Sources
  • http://kaheel7.com/eng
  • http://www.nasa.gov
  • http://en.wikipedia.org

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