1. Gravity Written by: www.kaheel7.com ABDEL DAYEM AL KAHEEL Prepared by:
Ahmed Adham
Dina Shawky

2. 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.

3. What is the aim of this presentation?

4. Tolerance of Islam 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.

5. What is Gravity?

6. Gravity or gravitation is a natural phenomenon by
which objects with mass attract one another.
Also it is a force that causes things to fall when they are dropped.The force of gravity gives things their weight.
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.

7. Was the first one to discover the law of gravity in the 17th century.
Isaac Newton
Was the first one to discover the law of gravity in the 17th century.
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.

8. Can we see gravity?

9. No, we can’t see gravity but
we can feel it.

10. How can we feel the effect of gravity?

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

12. 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

13. What happens in case of absence of Gravity?

14. Life on earth is impossible without Gravity
A big mess
is the only description of our earth in case of absence of Gravity.

15. Is gravity the same over the surface of the Earth?No

16. 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.

17. 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.

18. Is light affected by gravity?
Yes

19. 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.
The speed of light is still constant.

20. What about Gravity and astronomy?

21. 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

22. all have gravitational fields.
So that, all the cosmic bodies like the sun, moon, planets, stars, and cosmic dust, etc..
all have gravitational fields.

23. Earth's gravity keeps the moon on its path
around the Earth.

24. Is the Gravity equal in all planets?No

25. The moon has its own gravity, but it is not as strong as that of Earth
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.

26. On Earth, you might be able to jump 3 feet (almost 1 meter)
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

27. Fun in space
An astronaut who finds juggling fruit is easy without Earth's gravity pulling it down.

28. 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.

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

30. But, what does religion of Islam say about Gravity?

31. In the holy Qur’an Allah refers to this phenomenon in clear signs as He Almighty says:

32. (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]

33. 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.

34. 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.

35. Allah Almighty Says: (And on the earth are signs for
those who have Faith with certainty.(
(Sûrat Az-Zariyat- verse 20)

36. 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.

37. Thanks Allah for your Graces

38. Sources www.Kaheel7.com/eng http://kaheel7.com/eng http://www.nasa.gov
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