- 1 The Law of Attraction
- 2 forces affecting the speed of the fall of objects
- 3 Free Fall
- 4 References
The Law of Attraction
World of Isaac Newton revealed gravity which is subject to him all objects on the surface of the Earth Law, this law, he told how the fall of objects on the surface of the earth, and some of the beliefs that people have about objects and how to fall on the surface of the earth, and within these beliefs, how the effect of the weight of objects in the speed of its fall, which is what we will talk about this subject. 
Everyone may notice that when we throw two objects different Boznin, the body a larger weight up to the surface more quickly, as we also find that the body size and shape also density things affect the speed of his fall, but in fact, the Earth's gravity, which is the fall of the objects reason Earth's surface in the first place is not affected at all quickly fall objects, will race the fall of all objects on the surface of the Earth is 9.8 m / s square whatever this body size, or density or weight form, Fbalafterad if we have dropped two objects Karish and the car at the same time, they will arrive to the ground at the same time, when the Earth's gravity is to be the only thing affecting them.
Influential forces in the speed of the fall of objects
All objects on the surface of the Earth is not only one strongly affected, influenced by all phenomena and events on the surface of the earth in many different forces, whether this is in the nature or human life or science, as well as command in the fall of objects, Valjazbah ground no longer only on how influential the speed of the fall of objects on the surface of the earth, but that there is another factor is very important in this process, which is causing the variation in the speed of the fall of objects on the surface of the Earth, and this factor is the air resistance, air resisting is the result of a collision of air molecules scattered in the atmosphere of various objects happen within the atmosphere, and is affected by the amount of air resistance of objects falling on the surface of the Earth with a number of different factors, but they are affected by two factors two grounds; The speed of the fall of objects, and the area exposed to air resistance, which the objects moving more quickly exposed to higher resistance than air. 
You can note this when driving a car, the greater the speed of the car has become a need to put pressure on the gas pedal more to increase the speed of the car, or maintain it at high speeds, and whenever I felt the air resistance to the car body more as well, As for the surface area exhibition air resistance can noticeable when throwing pieces of paper; One of them folded, you'll notice that the paper folded down larger than the other quickly. 
When the fall of objects within the atmosphere free fall, the air continues to resist these objects in the direction opposite to the direction of its fall, even equal to the amount of force air resistance with the amount of force affecting the objects, which caused a fall, a weight, and during this period, the remaining objects earn an acceleration equal to the amount of acceleration gravity, so that the acceleration is zero and gain constant while the speed of the crash, and assuming the descent of two objects different Boznin, the body the less weight will reach stability shorter time than most body weight, and this will gain speed less than the other body. 
- ↑ "law of attraction", www.lib.nu.edu.sa, briefed him on 28.06.2018. Adapted.
- ^ A b "free fall and the shell", www.ecoledz.net, briefed him on 06.28.2018. Adapted.
- ↑ "Free Fall", www.twitmails3.s3-website-eu-west-1.amazonaws.com, briefed him on 07.06.2018. Adapted.
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